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Gravity survey in part of the Snake River Plain, Idaho
A preliminary report
*y
Harry L. Baldwin, Jr. and David P. Hill
U. S. GEOLOGICAL SUBVEf,
Released to open files
REPRODUCED FROM BEST AVAILABLE COPY
This repbrt has not "been edited or reviewed for conformity to Geological Survey standards or nomenclature..
U5518
Contents
Page
Abstract. ............................ J
Introduction. .......................... k
Field observations and data reduction ..............* 6
Accuracy.*. ............................ 9
Description of anomalies and qualitative interpretation ..... 13
Major features ....................... 13. -x * *
Minor features ....................... 1^-
Graticule analysis of profile A-A'................ 17
Structural relationship between the granite and the basalt. ... 20
References cited. ........................ 21
Illustrations
Page
Figure lo Differences in repeat and tie measurements ...... 10
2. Simple Bouguer anoiualies, Snake River plain, Idaho . , 1J
3. Three permissible interpretations of profile A-A' -, . 19
Tables
Table 1. Gravity data for Snake River Project. ........ .Appendix
Gravity "survey in part of the S:.ake River Plain, Idaho
A preliminary report
^byjBarry L. 'Baldwin, Jr. and JDavid P. Hill
i- " "'; Abstract - ' *
.-During the - early sxzmmer of 1959« a total of 1,187 gravity stations I
;r vere occupied on :the western part of the Snake River plain in Idaho.*:V>' .'-; '-_ «-F _, ' '' . - . _ ] ' ' ''' "; ' " : " 'An area [inoluaingjj 2,000 square miles (of the plain] extending from Glenns
Terry, Idaho,.to Caldweli, Idaho, vas covered with a station density of
sone station per two square miles. An additional 1,2£>0 square miles of .
surrounding area, mainly from Caldweli, Idaho, to the Oregon-Idaho state '
. line, was covered with a density of one station per seven square miles."~
Ihe mean reproducibility of the observed gravities of these stations was
0.05 milligai, with a maximum discrepancy cf 0-2 milligal. : Gravity data
"were reduced to'simple Bcujuer values usi:.g a combined free-air and
Bouguer correction of 0^06 milligai per footo \ -
,!Ihe only anomalies found with closure in excess of 10 milligals are
two elongated highs, orientated northwest-southeast, with the northwestern
high offset to the-.northeast by 10 miles 0 jOhe smaller of these highs * ; ^:
-extends from Meridiaii, Idaho, to Nyssa, Oregon, and the larger extends
"from Swan Falls, Idaho, to Glenns Ferry, Idaho. !Ihe maximum value
recorded is a 'simple Bouguer value of -6605 milligals with respect to* ' -
' ' . S - .
the International Ellipsoid,, Gradients on the sides of these 'highs are -
largest on the northeast sides, reaching six milligals per mile in places.
Graticule interpretations of a profile, across the southeastern high
using a density contrast of 0-3 8® Per c^ indicate an accumulation of
? iava reaching a thickness of at least 2C,000 feet«
Introduction
The Snake River investigation vas made for the purpose of
out, defining, and interpreting, gravity anomalies present on the western
part of the Snake River lava plain in Idaho. In particular, it was
rdesired to further ' define gradients associated with the gravity high
shown "by the regional work, of Bonini and Lavin (1957)- It was Qot planned
I to cover any specific area, "but rather to let the observed "anomaliesfc. ... ' ' f determine the course of the fie£d work.
The study vas undertaken as part of a project on Volcanism and
[Cms tal Deformation, supervised by L. C. Pakiser of the U. S. Geological
^Survey. .Professor Rodgers of the Geophysics Department of the Colorado=»££ - * *pap-'?V^;' "I; School of Mines acted as advisor.
The .part of the Snake River plain with whiclv.ve are concernex^ iVa
large, relatively flat, basalt-capped plateau, varying in. width ftf .
to 100 miles, which extends both north and south of the Snake
The area covered by the survey extends from lat. i4-2°30'H» to,. . "**and from long. 1150 15W. to H7°00'W. ; The Snake River plain in.jbfif ~y
, region is bounded on the northeast and southwest by highlands of granite
. V ~ I ' '
and silicic volcanic rocks. The Snake River, and its main tributary lit?:', ' "" - - ' u -.
L^the region, the Bruneau River, have cut canyons in the basalt vhioh% reach
^depths of TOO feet. Altitudes in the region range from" about 2/200 'feet.It;" " ' ' ;- ' " -" : " . ys above mean sea level near the Snake River to over ^-000 feet above meanSfew ' - . '- ' * . ' ' - ":?:£KV' ^ ;sea level near the borders . ;J ; -- * *
- 1 ' - s The exposed rocks of the area are predominantly Tertiary and,.
Quaternary basaltic and clastic rocks. A thin cover of Quaternary'
alluvium hides the lava in places. In general, soil is thin or absent.
In the northwest part of the plain, clastic deposits form a substantial? .?
part of the geologi6 section. Exposures in the Snake River canyon show ' * . " .. - -
that interbedded layers of sedimentary rocks and basalt extend down at .
least 700 feet below the top ojT -the plateau. Information from, 10o3£te<& v^ . ; '.-...-' - ' , >*>v-J
wells drilled in the area indicates that basalt is scarce to a depth, of; . ' . ._ '^K^
'-' . ' *- -c - «V ,--""
at least 1,17^ feet below sea level between Bruneau and Qlepnn -Ferryr. A<. :f,^ ! ' ;:/ ;V - ' .'.' $- * /- '. '" ' ->. :\ (Youngquist and Kiilsgaard, 1951) and to a depth of at- least X,o39 ^$*£f
, ** ^ *
below sea level at Ontario .
v. 5 *
Field observations and data deduction
>
The field work was done betvoeu May 25 and July 31> 1959* during
which time a total of 1,187 stations were occupied. Of these, about
[200 were occupied more than once in order to fke^pTjcheck on the accuracy: * i-
of the -survey. The 2,000 square-mile area extending from Glenns Ferry,
Idaho, to Caldwell, Idaho had a station density of one station per two
Jsquare miles» Another 1,200 square miles of surrounding area, mainly
ffrom Caldwell, Idaho, to the Oregon-Idaho state line, was covered withS-|a density of one station per seven square miles.
|p; Horizontal and vertical control was obtained mainly from U.£S~-Geological^Survey/quadrangle mapso Most of the survey was done over terrain covered by
;maps of scale 1:24,000; however, the control for about 80 stations wasS^:v:'%re
Staken from 1:62,500 mapso Locations and altitudes of 17 stations were
obtained from Army Map Service charts. ,
- T-ie entire survey was done with Worden gravity meter No. 388
havjne a scale constant cf 0«5328(l) milligal per dial division. This
meter could be read to the nearest 1/10 dial division. The survey was* /
.tied in with the absolute gravity by initially placing a series of base ' |!t£": $!&' ^stations near Boise, Idaho, and obtaining their observed gravities
^relative to the value at the Boise airport as determined by Woollard
0-958)o Later in the survey, other bases were established relative to
these secondary bases
Loops ranged in time duration from two to five hours, with the f
average loop lasting about four hours and including about 12 stations..
(it least one station within a loop would be repeated for the purpose oft : "checking instrument drift, and, in addition, a station from an adjacent
loop would be reoccupied to keep a check on the accuracy of the observed
gravities. This procedure was followed in all but three or four loops
where tine or terrain considerations hindered repeats.
The following infonnation was recorded at each station:
lo Instrument reading
2. Time
3» Elevation
k. Latitude and longitude
5. Location description
6. Remarks
Baldwin and Hill each operated the instrument on alternate loops the
one not operating the instrument recorded the first three of the above listed
|item.s 0 Mrs,, Baldwin, who accompanied the field party, recorded the last
ythree of the listed items Latitudes to the nearest half-second (except£?' »£ ' -
|of stations located by the A^M.S, charts where the accuracy was within
yswo seconds) and longitudes to the nearest three seconds were scaled from
available maps,. The location description included auch items as type of
spot elevation (such as bench mark, section corner, road Intersection,
etc.) section, township, and range in which the elevation appears, and*^
*.brief description of exact location so the station could be reoccupied
if necessaryo Information that would aid in terrain corrections or latec
interpretations was recorded under remarks.
Drift curves were prepared at the end of each day. Drift was
considered linear with tiiae between base station readings made at the. *# .
^beginning and completion of each loop, unless repeat readings in the
llbop indicated otherwise 0 A drift curve was never altered without<!&''
supplementary information from repeated stations. The drift curve was
divided into segments, each of which was assigned a base-station value
the nearest 1/10 dial division. Each time a base station was occupied
Ht least two readings were taken in order to insure an accurate reading*
the first two readings were not the same, the instrument was reread i *
itil a duplication was obtained, and this was the value recorded.
Instrument drift seldom exceeded Ool milligal per hour. T3ie usual
fjattern was for the instrument to drift down at the rate of about 0.07
milligal per hour until the hottest time of day (about kiQO p.m.) and
jthen to level off or even to rise slightly until sunset. Drift was
small or absent on overcast days*
A combined free air and simple Bouguer correction of Oa06 miJJLigal
per foot was applied to each observed gravity where a station elevation,
Sjvas available. This corresponds to a density of 2.67 grains per cubic«*?*£ : vgcentimetero* Catum elevation was mean sea level.
* The fact that the density is given to the nearest Qo.01 gm. per cm-*
does not nean that we claim this accurate a knowledge of the density.
^iflb*^**"' " *.means only that this density is the one which leads to the convenient
.of 0.06 milligal per foot for the elevation factor. The density of
an average crustal section above mean sea level, howver, is close to
2.67 gm per cm . ' *
8
No terrain corrections were applied to the data. Most of the area
P^covered by the survey is relatively flat, and it was estimated thatp ' Hammer, 1959 terrain corrections out to zone M of the Hammer chart/would not amount
|o more than about two milligals. In the mountainous regions, the terrain^ be ^
corrections might [gnQmrfe tojas much as five milligals, but even this
amount is negligible compared with the size of the larger anomalies found.
Closely spaced stations would have about the same terrain correction, '
juod so no distortion of the anomalies would result from neglecting the
JSerrain effect.
Latitude corrections were taken from graphs which plotted the
correction against the latitude. Information for constructing these;lff-
graphs was 6btaine<jL from "Valuas of Theoretical Gravity on the Internationall8rv *
JLLipsoid" in Nettleton (19^0, p* 139-1^3) -
r f All gravity values were carried to 0 0 01 milligal within the survey.
After correction for elevation and latitude, the simple Bouguer values,|fe "were rounded off to the nearest 0.1 milligal. Station number, latitude
and longitude, elevation, observed gravity, and Bouguer gravity are
^compiled in -Table..!.38lfe>
\
Accuracy
Bie accuracy of each simple Bouguer value depends on the accuracy. i
^f the follovingr1. Woollard r s value for the Boise airport station
2. Observed gravity
3. Station elevation
^o Latitude correction
' '. 1. Vobllard's vaJTue for the Boise airport station: The observed">"i
gravltieB of the stations in Woollard^ loops are accurate to within-v .# .' ' _
about 0.2 milligal (Woollard, 1958).
9
2, Observed gravity: Checks on the accuracy of the observed,
gravities of about 200 stations were made by a system of repeats and ties.
Kepeats are defined as readings at stations that vere occupied tvice and
vhose observed gravities were computed in reference to the same base
station for both cases. Ties refer to readings at stations whose observed
gravities were computed twice from two different bases» To be classified
as a repeat it was not necessary that a stat£bn be read twice during the
same loop only that the two values b^e determined from the same base 0- *It follows that if the observed gravities of a repeated station differ,
they will do so by integral multiples of 1/10 dial division (0.053 milligal).
Since the gravity values within the survey were carried to 0.01 milligal,
ties may differ by integral multiples of this fig-ore. ' '
There would be a difference, in terms of accuracy, between a repeat
reading within a loop and one from a previous loop, if the repeat reading
»within the loop were used to adjust.the drift curve. If this adjustment
were made, the difference between the repeat readings would be zero "by
construction. Because of the short time duration of most of the loops
and the observed linearity of the drift, only one drift curve was adjusted
in this manner. This loop lasted until about 6:00 p.m., and previous*
experience had shown that the normal downward drift of the instrument
stopped at about ^:00 p 0m. anri leveled off. This repeat was net counted
in the totals.^
10 followed by lOa
»-
A total of 171 repeats and 108 ties were recorded during the* *
Graph A (fig. l) shows the number of repeats that differ from th» original
Figure 1. Differences in repeat and tia measurements,
reading at a station by integral multiples of 1/10 scale constant. Graph
C shows the number of ties that differ from the original reading at a
station by integral multiples of 0.01 milligal. Only absolute values of
the differences have been recorded. Assuming that the sign of the
discrepancy between readings is as often positive as negative, the
distribution curve for repeats woulxL'likely, be &8 shown on Graph B, A
continuous distribution would probably be- shown by a curve such as is
drawn in Graph B, where the area beneath the curve is equal to the sum of
the areas of the rectangles, 15ie mean precision (that is repeatibility)
of the readings is the value of the difference such- that one half of all
differences are greater than this value "and one fraif are less, the signs
of the differences being ignored. If this value be designated by £, ,
then
where f (x) is the continuous distribution' curve» Kie" discrepancy between*v "* ' */ * _,
the value of g for repeats and the value of 6 for ties is believed duer
to the small size of the statistical sample-from wtiiclv the B« values were
derived.
lOa
f S4 :
300) ._Figure i
Graph Al.thnbsr.ot Repeats
60
-40-
-^30
-ae
iDifferehces : ihl 'Repeat ;dn1d{ : ';,: i : ;:_-.: ,;";(- : :,_.L:____ t V'
- : ; : i
IBS
0-f
U-
Graph' 8-u
-A* . -:.-o3
of Tte» r- 20"
Grqph 015
-:S~-:
*
24,-|.:
--J--
i
0(2
-4-:
--L- -'-4.
-A
-ai
--K}
r-
-3d -T ~ -
' : *
-jt - Difference^ In . R«P_eat_R«oditvg> . t ".]
.!..'_ '! . (Kel Divisions) -.' " -I ] - - i
T; .
IkO3
-T ...
* "
f.. :r \
^; ttffwisnce ini Repeat! Readinqa
0.075- clio)
- !
_ra
Mfcan
^ 4 .ip !^ .; '14.
; Pre^sibn ] : O.05:
20JSfference; in RwWed MeoBuremerts
. [ .- ;"(4P» ' M'^
mean error} that is, the mean difference fran'the true value,
of the-readings ia slightly leas than the precision, IMS is intuitively
evident when,one considers that a large difference between two readings
at the same station does not mean that one reading is in error by the
amount of the difference. It is more likely that one reading was too
high and the other too low. In the same manner f if two readings at a
given station do not differ, it does not necessarily mean that both
reading*" are accurate. It means that they are either both accurate (to' * *
within the reading limit of the instrument) or that they are both in'*****" < ** ~*
error Toy the same amount. "A third possibility is that the measured
difference is caused by both readings being in error in the same direction,
but by different amounts. . -Geological Survey .
3« Station elevation: Elevations from the U»S./:.'5. .quadrangle:
are generally accurate to within three or four feet. A few spot elevations
determined photogrammetrically by the Geological Survey were used, dese
ej,evatidnd are believed accurate to within six or eight feet. Spot
elevations marked on the 1:250,000 maps are accurate to within five feet.
At times the exact location of a spot elevation was uncertain. In areas
where the station density was not too great, a few stations whose -
elevations were known to within 10 feet were used. No elevation with. *
a possible inaccuracy of over 10 feet was ever used.. An error of 10 feetT '
in elevation would, correspond to 0.6 milligal error in elevation-
.correction. Bx general, .the error in the observed gravity due to an errorr!*, * . * -v
in staftiari elevation is beJJLeved to be less than 0»2 mJJLLigal.
11
ko Latitude correction: The latitude corrections were taken from
the values of theoretical gravity on the International Ellipsoid as
given in the table in Nettleton (19^0). These values were plotted on
a graph of such a scale that the latitudes could be read to the nearest
half-second, and the corrections to the nearest 0.02 milligal. The
change of theoretical gravity with latitude in the vicinity of the
survey is about 0»03 milligal per second Because latitudes were read
vrith a maximum error of 2 seconds, the maximum error in latitude correction
is about 0.06 milligalo The mean error is believed to be about 0.02
milligalo
Taking into account all the factors that contribute to the simple
Bouguer values and analyzing their accuracy, we have the following
results:Probable error (mgal) Maximum error (mgal)
Voollard's Boise value 0.1 ? Q.,2
Observed gravity 0.03 0.12
Elevation (times Oo06 mgal/ft) 0.2 0.6
Latitude correction 0*02 0.06
The largest possible error in simple Bouguer gravity from all sources
ia about 1 milligal.
12
Description of Anomalies and Qualitative Interpretation
Major features\
. . The most conspicuous features on the gravity contour map of the
vestern part of the Snake River plain (fig. 2) are two elongate positive
Figure 2. Simple Bouguer anomalies, Snake River plain, Idaho,
anomalies trending northwest-southeast. The axes of these features are
not co-linear the westerly high is offset 10 miles northeast from
the axis of the southeastern one*
T3ie southeastern high is the larger of the two in both magnitude
and area! extent» Its axis can be traced from Glenns Ferry, Idaho,
westward to Hammett, Idaho, and thence northwest to a point about 10
miles south of Nampa, Idaho, a total distance of about 80 miles * Its
*peak gravity is a simple Bouguer value of -66.5 milligals with respect
to, the International Ellipsoid This maximum value occurs about midway
^along the axis, Bie gradient is steepest along the northeast side, wheref
the gravity drops 5Q milligals in 8 miles. On the southwest, the gradient
averages about 50 milligals in 12 miles. The total drop in gravity from
.« the peak ta the surrounding-area is over 65 milligals.
13 followed by 13a
axis of the northwestern high can "be traced from a point 3 miles
south of Meridian, Idaho, northwestward to about 3 miles east of Nyssa,
Oregon, a distance of about kj miles. Its peak recorded value, with
respect to the International Ellipsoid, is -79*2 milligals, which occurs
at about the middle of the northern half of the axis. The gradient on
the western part of the southern end is the steepest on the anomaly
reaching 30 milligals in 5 miles. The total drop in gravity from the
peak to the surrounding area is over 50 milligals
13a
most plausible explanation for the existence of these two, ,
large anomalies is that they are caused by thick accumulations of heevy
rocks. Lava venders part/ of the surveyed area. Large areas of granite
to the northeast and southwest correspond with gravity lows,,
Minor features
Aside from the'two highs described above, no features either
highs or lows having closures in excess of 10 milligals were defined
in the survey, ' The smaller anomalies are confined mainly to parts of
the area where the surface rocks are distributed irregularly and the
terrain is uneven*.
In the Montour 15' quadrangle (lat. Jf3°^5 l N. to W.°00'N., long.
ll6°15'W. to H6°30 lWo), many minor features were found. A general drop
in gravity readings was found from the west to the east in the Montour
quadrangleo The -120 milligal contour gives the approximate shape of
this change. BM* direction of this contour changes from southeast to
southwest as the contour passes southward through the quadrangle. A
possible reason for the presence of this gradient is that the Columbia*
River basalts Ifcedge out on the Idaho Batholith. On either side of this- < i
gradient are found IOVB of about six milligals each that correspond * .? . i~>
closely to outcrops - pC sedimentary deposits.
llxe eastern part of the Montour quadrangle and the region to the
north of Boise contain several minor features. Because cf the small
number of stations in this area, little credence should be given to
the shapes of these small anomalies as they are drawn on the map. Two
* of these are "one-point" anomalies, and further work should be done in
the area before interpretations are attempted.
A sma.11 feature of interest appears in a valley north of Boise.
TMs is a high with closure slightly in excess of 6 milligals and with
gradients on its sides as steep as 6 milligals per mile. The valley
is probably filled with basalt since outcrops of this rock are found
along the valley sides. It is possible that an accumulation of lava
in this valley, in contrast with the possibly granitic cores of the
mountains bordering the valley, may give rise to the anomaly.
Another type of minor feature vas found repeatedly0 Scattered
over the plain between Boise and Mountain .Home are numerous small hills,
locally called "buttes," varying in height from 50 to about 300 fee to
It was found that readings taken on the tops of these hills, after
corrections, invariably differed from the trend in the region by as much
as -4 milligals. The lovs located at lat. 1O°15 1 N., longo ll6°12 r W.,
and lat. V3°l4'N., long. Il6°01 f tf. (fig. 2) are examples of this type
of minor anomaly. These minima are quite restricted in area for it was
observed that readings near the bases of the hills fit into the regional
trend quite well 0 Only when the stations are right on the tops of the
hills do these anomalies appear. It was originally thought that terrain
corrections would account for the differences, but detailed terrain
corrections for two of these hilltop stations, show that terrain effects
cannot account for more than about one milligal. There seems to be no
relationship between height of hill and size of minimum because nearly
equivalent differences were measured for hills 300 and 75 feet higho
These hills may be surface indications of lava vents filled with low
density vesicular lava in the upper part which would result in low gravity,
However, the lava on the tops of these hills does not differ noticeably
from the lava found elsewhere in the region
16
Graticule analysis of profile A-A'
Profile A-A' is a line 32 miles long trending N. 3U°E, The south
west end of the line is at lat. ^2O53'N. and long. ll^Ol'W. The axis
of the southeastern gravity high is intersected at right angles by the
proflie«
In profile the gravity anomaly cut by A-A 1 appears as a symmetrical,
bell-shaped curve, with an amplitude of 55 nilligalSo The gradient of
the northeast side is 5»2 railligals per mile, and the gradient of the
southwest side is ^.6 milligals per mile 0 The peak of the aiionaly occurs
about 7 1/2 miles northeast of the Sr.ake River as measured along the
profile.
17
The method described by Hubbert (19^9) vas used in the interpretation>
'at the profile. The accuracy of this method (and of x any two-dimensional
graticule interpretation method) depends on tvo major assumptions:
(l) that the length of the body being analyzed is so great in comparison _';,
with its width and depth that it can be considered to extend infinitely ,*,' '*
along its axis and (2) that a reasonable density contrast has been chosen*
Reference to the map will show that the anomaly cut by profile A-A 1 is
greatly elongated and, hence, that the first assumption is valid*
Considerable latitude exists in choosing a density contrast* Presumably, .
rocks cut by a section along profile A-A 1 are of three general types:
granitic, basaltic and sedimentary. A density of 2«7 ®a per cm^ was
assigned to both'the sedimentary rocks and to the granitic mountains, anft
it was assumed that the granite at depth is the same density 0 The mean-
'density of basalt is about 3-0 gm per cnH. This figure was adopted for
the density of the basalt in the Snake River plain. Using these values,
the density contrast is 0*3 && per cm^. The densities of the main types
of,* rocks perhaps increase with depth, but it will be assumed that the
density ccsrtrastvremains constant with depth*
18
Information from wells drilled in the Snake River plain indicates
basalts may be rare down to a depth, of at least ^,000 feet (Youngqjiist
and Kiilsgaard, 1951; Littleton and Crosthwaite, 1957). In consideration
of this knowledge, three permissible interpretations have been developed,,
The first was made assuming that the basalt extends to the surface cf the
plain. Ihe second and third interpretations were made assuming that the
top of the basalt is at a depth of 2 kilometers and k kilometers,
respectively, and that the material above the basalt has no density
contrast with the granitic rocks.
Examination of the Bouguer anomaly map shows that the background
Bouguer gravity is in the neighborhood of -130 milligalso In matching
the curve that would be produced by a hypothetical rock mass to the
observed curve it was found convenient to assume a background of -125
milligals.
Cross sections of the three possible anomaly-causing bodies are
shown in figure 3« The outline of each of these bodies is only intended
Figure 3. Three permissible interpretations of profile A-A'.
to give an idea of the general shape of the feature
It can be seen from the three interpretations that even with the
relatively high density contrast chosen, a rather thick accumulation of
basalt is required to produce the anomaly, Uhe most plausible.of the
three interpretations seems to be the one which assumes that the top of
the basalt is at a depth of 2 kilometers« This interpretation is favored
because it does not require as thick an accumulation of basalt as the case
where the top of the basalt is assumed to be at a depth of k kilometers«
19
-70
-80
.c: ag a -so
§ I -wO £
2. -110
-130,20 30 40 50 60
KILOMETERS
SURFACE
S/g KM
SURFACE
2 KM
12/2 KM
SURFACE
4 KM
DENSITY CONTRAST
0.3 gin/cm3
24 KM ____
Figure 3. Three Permissible Interpretotions of Profile A-A1
a
Structural J^lationshlp "between the granite and the basalt* .
Die writers ,are not sufficiently familiar with the geology of the
region to arrive at definite conclusijans concerning the structural...--»-
relationships indicated "bjrrthe anomalies 0 However, two general
possibilities exist concerning the "boundary between the granitic and
"basaltic rocks. They are:
1. Fault contacts
2. Downwarp
Of these two possibilities, the first is considered by the writers
to be the moat plausible Faults are in evidence on the surface and the
trend of these closely parallels the direction of the contours along the
northeastern slope of the eaaterly gravity high (Malde 1959 ) The
steepness of the boundary for each interpretation makes the likelihood
of a downwarp small» Even if such a downwarp does exist, it is unlikely
that it could have occurred without large-scale faulting, and thus we
return to the first possibility.
Further support for tihe theory of fault contacts is provided by the
slight irregularity of the gradient on the northeast side of the southern
anomaly. This is.shown on profile A-A1 as a slight flattening of the
slope around the -85 milli&atl level* This irregularity is not a
peculiarity of this profile only, since a close examination , of the map
will show that this gradient change exists for a considerable distance
both to the northwest and to the southeast of the profile. A possible
cause .of "this irregularity might be two distinct faults.
20
References cited
Bonini, W.E., and Lavin, P. M., 1957, Gravity anomalies in southern
Idaho and southwestern Montana/ absTJ: Geol. Soc. America BuUL. }
v. 68, no. 12, pt. 2, p. 1702.
Hammer, Sigmund, 1939* Terrain corrections for gravimeter stations:
Geophysics, v. ^, p. l8U-19^.
Humbert, M. K., 19^, Line integral method of computing gravity: Geophysics,
v. 13, p. 215-225.
Littleton, R. T., and Crosthvaite, E. G., 1957, Ground-water geology
of the Bruneau-Grand Viev area, Ovyhee County, Idaho: U. S. Geol.
Survey Water-Supply Paper 114-60-D, p. 1^7-198.
Malde, H. E., 1959 > Fault zone along northern boundary of northern Snake
River plain; Science, v. 130, no. 3370, p. 272.
Nettleton, L. L., 19*^0, Geophysical prospecting for oil: New York,
McGraw-Hill, Wl p.
Woollard, G. P., 195^* Results for a gravity control network at airports
in the United States: Geophysics, v. 23, no. 3, p. 520-535.
Youngquist, Walter, and Killsgaard, T. H., 1951, Recent test drilling,
Snake River plains, southwestern Idaho: Am. Assoc. Petroleum
Geologists Bull., v. 35, no. 1, p. 90-96.
GRAVITY DATA FOR S:\AXE RIVER PROJECT
Station Latitude Longitude Elev. Observed gravity Bouguer g.(feet) (-979000 milligals)
*.*" '^
1-1
1-2
1-4
1-5
1-6
1-7
1-8 ..'..
1-9
1-10
1-11
1-12
1-13
1-14
1-15
1-16
1-17
1-18
1-19
1-20
1-21
1-22
1-23
-43°34'C6"
43*34 '20"
43'33'2c;"
43°:;'55 11
43 £'30'33"
43 31'02"
43 '33 '16"
43 33 '03"
43 31'54.5"
43 3l'54.5"
43-31'54.5"
43 31 '02"
43 31 i 02"
43 30'10"
43 32'46"
43 /32'29"
43 "33 '37'
43 3V39"
43- 34 '42. 5"
43 '"35 '22. 5"
43-36'33.5"
43 <: 36 i 03.5"
43' 35'20"
116" 13 '12"
116*14 '34"
116*14'55"
116^13' 56"
116'13'36"
116 ^13' 56"
llG-'lS^g"
116' 12'45"
116- 12'45"
116 11'33"
116 10'21"
116 "10 '21"
116"11 I 32"-
116'' 11 '34"
IIG'IO'SS"
116 09 'r; 11
116" 10 '03"
116- 07 '51"
116'10 I 22"
116-"' 11 '32"
116 C 11'10"
116'10'02"
116^09'40"
2804
2797
2873
3139
3050
2317
2G54
2917
2946
2993
3027
3016
3163
2921
3003
2873
2827
2744
2723
2716
2731
2730
1208.2
1213.4
1216.1
1211.1
1192.7
1153.0
1212.5
1203.3
1206.9
1203.0
1199.8
1199.1
1199.4
1139.3
1202.3
1197.0
1204.5 '
1203.1
1212.7
1214.5
1216.1
1214.7
1213.5
""
-118.9
-115.3
-113.5
-114.0
-114.1
-117.4
-119.2
-115.1
-117.2
-117.2
-114.9
.-114.3 //£ 3
-115.2
-120.2
-120.6
-122.7
-121.8
-.123.9 J$3.8
-124.3
-124.9
-124.6
-124.3
0
>,5//Station
1-24
2-0
2-:
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-13
2- 14
2-15
2-16
2-17
2-i8
Z-IS
2-20
2-21
2-22
2-24
2-25
Latitude
43 34'21.5"
43 35' 24"
43 35'26"
43 35'26"
43 35 : 26.5!I
43 34 ! 33.5"
43 34'33.5"
43 34 : 33.5"
43 34'33"
43 33'4i"
43 33'4.i' i
43 33'41"
43 37'i0.5"
43 37 ' 10.5"
43 36M.8"
43 37 '10"
43 36 '24. 5"
43 32'43.5"
43 32'43.5 51
43 3L'55"
43 30 : li !t
Longitude Zlev. Observed gravity Bouguer g.
116 07 '40"
116 15 '09"
116 17 '35"
116 18'^8"
116 21'13 !;
116 22' 24"
116 20' 00"
116 18'48 :l
116 16'23"
1J6 17'36"
116 20 ! 00"
116 22'24"
116 22 '24"
116 21 ! 13"
116 20'00"
116 IS'46"
116 17'35"
116 18 ! 48"
116 21 ! L3"
116 22 '24"
116 22 ; 24 :!
43 30'10.5 !1 116 20'43"
43 31 ! C3"
43 31 : 55.5 !
116 20 '37"
' 116 20 '02"
43 2C'45.5" 116 16'33"
43 31 1 04" 116 17 '37"
2765
2776
2733
2698
2658
2548
2697
2724
2745
2772
2711
2675
2607
2624
2652
2662
2686
2729
2727
2735
2707
2753
2744
2733
3053
2982
1212.6
1214.2
1223.4
1230.1
1241.0
1245.7
1235.1
1229.5
1220.3
1223.6
1234.0
1242.3
1247.9
1241.8
1236.3
1223.3
1223.6
1229.9
1232.5
1230.3
1227.7
1223.3
1225.4
1228.3
1202.6
1207.6
-122.1
-121.4
-114.9
-110.3
-100.9
-96.3
-104.1 /O4-0'
-108.0
-115.5
-109.7
-102.9
-96.8
-100.5
-105.6
-108.2
-116.9
-118.9
-104.7
-102.2
-102.6
-104.3 J04.
-105.9
-105.6
-104.2
-109.4
-109.2
OC)
Station
2-26
2-27
2-31
2-32
2-34
2-35
2-37
2-38
2-39
2-40
2-41
2-42
2-43
2-44
2-45
2-51 5
2-53 : -
2-54
2-55
2-56
2-57
2-58
2-59
2-60 -
Latitude
43
43
43
43
43
43
43
43
43
43
44
43
43
43
43
43
- 0
43
43
43
43
43
43
43
43
31
31
36
35
37
37
33
32
31
34
33
30
31
31
31
42
. 1
46
45
43
43
44
43
45
48
'03. 5"
'56"
0-/.5"
'50-
'24.5"
'39"
'58"
'17"
'35"
29"
'37"
08"
'53"
'53"
52"
25"
t -> r .,
'34"- "
'34"
'15. 5"
: 32"
'25.5"
: 45 M
J 31 M
56.5"
Longitude
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
_..^
. 116
116
116
116
116
116
116
116
18
18
14
13
13
14
06
05
03
00
03
04
05
06
08
18
-_
22
22
19
15
15
16
16
15
'43"
'48"
'33"
' 22"
'03"
'43"
1 52"
'26"
'58"
'54"
13"
'24"
'36"
'46"
'00"
'45"
-_. '
58"
'05"
'46"
'45"
'26"
'53"
'34"
48"
Elev.
.2782
2801
2729
2745
2677
2656
2793
7
2841
3522
3707
3625
3138
3142
3097
2985
2907
2930
2963
3138
3242
3168
3082
3014
Observed g
1222
1223
1216
1214
1218
1219
1212
1207
1208
1163
1157
1156
1189
1190
1192
1202
1202
1199
1196
1181
1177
1184
1191
1198
ravity
.1
.0
.1
.1
.9
.7
.4
.3
.2
.2
a.7
.4
.8
.3
.5
.7
.7
-^
.3
.3
.1
.6
.4
Eougucr
-106.
-105.
-123.
-124.
-125.
-126.
-120.
-117.
-126.
-120,
-120.
-119.
-117.
-118.
-111.
-110.
. -HI.
-112.
-117.
-117.
-116.
-113.
-112.
C
6
9
5
0
7
5
0
8
3
0
1
2
6
7
4
2
5
7
4
9
2
9
5
£*OS-
S*£S-
8'IG-
3*eG-
0*16-
8*18-
8*05-
o*e6-
3*58-
£*56-
o*56-
e*e6-
5-56-
6*96-
G'VG-
8*£6-
VS8-
5'16-
9*96-
£'9G-
e'£6-
£'001-
8*56-
V36-
6*15-
2 janSnoq
8'T£3I
3*5531
VI53I
I*e53I
0*e53I
C'3£3I
- 5*5531
0^531
e**793i
3*srei
0*^31
£'erei
i*orei
I'ereiQ*/.';3T
rcrei
9*£53I
9'9rei
i*erei
o*^e3ir prT'TU O '^ - w
9'3e3I
5*8e3I
3'6rei
e'e53i/C^TACj3 p^AJ3SCO
t7353 11661 83 911
<7593 ,.13,83 911
6393 ..13, S3 911
5553 u^e.63 911
0£53 U7C.63 911
ei53 »ee,53 911
9Z53 .i97,re 9TT
' G093 :i!r:,C3 911
9953 n^c.rr: OT-L
C£53 HT.3,C3 911
1193 .,33, °3 911
3393 .,3r, ': 911
9793 ,,60, 7.3 911
£1°: u-'.O./.U 9TT
r, r- r -. ^ r r ^; ., n ^ T
9G93 ur:5,53 911
vOr3 uC7,J73 911
3G93 ,.:'!7,73 911
C*-^T ^r r7 OTJ 2 , ; ^ l.,r,_:6 v L L
GC93 ,,°7,73 911
r:?~ ,:^C3 ?ii «-OQ"^ <" -» -"T r "^ T V u ^ 0 1 1 r; v i 7 Cy V - L
-»r/-*» r-c- .--7 pi r T oLi.u 1 1 2 o i :. o ,/i.L
9593 ..7e,e3 9TT
8T93 .;7etC3 9:i
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,:5"53,93
n r<- ii i'o i b o
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1.7C i 7o
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n^c i _e
MC. /i o e
n3e , 7"c>-- r r \\*~ ^ \ : -^
^i-^ n~ -*
e^7
e<7
7
c.s
C-H\^ /
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r~ i~.
'""-!- ^ /
r~ --. o /
e<7
C<7
e^7
evr- - -,
C7
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c--7
- 7
ej/
e-7
»"*-
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ev,-^.-r
r~ -c
u-c
9i-e
T - C
C-C
w.SIICii^ticn
-t u
4-1
'' ~ °
> o -/ - j<
i.. ~L,
4-5
4-7
4-8
^ ~ -""
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-13
4-19
4-20
4-21
4-22
/ - ? °
4-24
4-25
T ~
43
43
43
43
/ ','' T->
43
43
43
/ o'r ->
43
43
43
43
43
43
43
/. 'j -T J
- 43
43
43
/ ^ -f J
43
A°
__' o
43
tit
40
40
j^
38
33
38
33
37
JO
41
43
44
^r J>
42
40
33
33
39
38
40
/, -i
41
43
42
43
ucict
1 53 u
I o o I i~< >
i o '. : i
'55"
1 -~ !! w<_<
'02"
'02.5M
'09"
'33"
'41"
J-!>
25"
1 ', C II -! w . _<
i ' ^ i; u
'00"
1 ".Ml_/'-r
'53"
41"
'59^5"
1 T 0 11
, 31 M
34"
'11"
'35"
'4G !I
Lor.j
115
115
115
115
T 1 ^-L ^ /
116
116
116
.i-lo
1]6
116
116
1 i 6
llu
116
116
116
116
116
116
lie
116
116
116
116
:> * *
18
ucc
.29"
16 '42"
17
IS
^
22
20
*. o
16
io
1 1 .0- ./
13
16
15
15
13
1C
CO
11
12
13
10
09
13
15
05"
'48" '
i ~ :; <L_;
1 O ." 1 1 .«-_>
1 fl < ». 1 1O w
i o ' : ii-O
1 0 '. ! I -r
'47"
' i i u
'05"
05"
39"
'09 I!
'56 :l
1 0 111
or 1
I r / it_^T
'35 !l
! 56"
28"
'33"
55"
'10"
Elev. Observed gravity
*) C Q CZDo j
2603
2612
2653
'-.' 'IT
-U_ JL
o o 2oCo
'' ' ' 1~-W-r i-
2699
2 6 34
2:40
2CG2
2731
*~ t ,~\ f\ -^^oO/
31S8
2667
2664
3133
4359
2367
2373
3126
3918
4051
2943
2847
1232
1229
1229
1228
T O n "* A. ^-^ O
1245
1233
1219
1221
1223
1226
1227
1223
1191
1224
1220
1186
1115
1206
1209
1190
1147
1087
1209
1216
.8
.3
.3
,2
"T
.9
1 2
.5
.4
»-\.^
.7
.7
.4
.5
.4
.2
.3
.7
.5
.1 -
.6
.7
.1
.9
.0
Bou^ucr
-122
-123
~.~'r~' r'i
-120
-111
-103
-114
-123
-124
-124
-127
-124
-123
-129
-124
-127
-130
-131
-129
-127
-100 i. ~J ~J
-128
-135
-126
-127
rr £>*
.5
.8
;5
.1
r\ w
.7
.5
.4
.5
.9
.6
.2
.0
.3
.6
.4
.1
.4
.1
.6
o
.7
.1
.5
.8
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rH
rH
rH
vO
vO
m
rHO
r*.
CO co
r*. vo
in
coC
M
CM
0
1
OJ
CO
m
r-4
C
D
rH
<f
rH
in
rH
C -, rH
O
40
1
r^
CM
O
J
r-4
i-4
rH
rH
,-4
r-4
rH
r-4
o
In C
t <i-
1/1 C
M
01
C
O
CO
C
M
iM
vD
CO
O
C
O
CO
<] -t
<r <i-
^1
rH
CN
f 1
v-j- in
10
mi
t i
i
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^
(joo)
A3 A5 ! 15.5" 116 19'45" 2632
43 43'32" 116 15'45" 2371
/ -3 / ', I '; r- r 11 nit " q I 9 <; »> *"< O X, 1'-.--»'-. -4 _ _^ . _/ i.i.0 i J ZO ^ o G 1
/. -; , ii - ', - ' \ ~' \\ " 7 7 ^iS> ^ -. .J -, _/ -. ^. O _ u _/ _> ^. / / J
_/ G
5707
/ "i > i'ii-- 11 - i ,' i i ,- -, 11 T o 1 : -f-v^i *^-» -.--'-.-/ ^Ivj -L-» v/~ _Ol-;
4-52 A3 A6'io" 116 12 ! .o" 3735
A-63 A3 47'A3" .16 11'5i"
A-" ', A3 Av 'I::..:/' HO .7'.-."
4-65 43 A5'59.5" 116 10'15"
/. o r M I 7 c 11 "I 1 f, - p I i r; t rt)._i ^O _>/.J llO j_O *._;
/, 'j r O I - .--, 11 1 "I ". ' f ' O ' : I<4_) J _ ^.U l.u .. O U-.
/ '; : 'J > / 7 11 1 ". i- "I ° ! "I ' H~i _> _/ J -. / llOi-lu
A3 ^5 1 53.5 !I 115 11 S 4V"
43 j7'A0.5 fI 116 il'52"
A3 59 ! A9.5" 116 11'03"
in r - : ~ ' 11 -, -\ (i ' , o i - : 11 o - . - - -!-'_-'. _' -.- j. 1 O U ,' -. w _; j. O -i
.5 ! 13 I! 2556
43 54'05" 116 14'03" 2534
45 51'12 lt 116 13'34" 3353
43 5j'48.5" 116 14'14 :| 4029
43 50'10" 116 14'40" 4247
Observed gravity
1214.3
1229.3
1215.7
1219.5
1227.7
1^21 2
1179.2
1154.4
1154.1
1113. G
1173.5
1132.5
1190.0
1 0 r r r 1 £ \J J . _J
1 lOO . ^4
1241.2
1249.2
1244.9
1243.7
1211.6 -
1251.S
1249.3
1197.5
1158.2
1147.5
Lou^u^r ;;,.
-150.0
-126. S
-126.4
-" ">L SJ.i-*T . J
-12C. 9
j. iO . O
-1_0.9
-123.6
-12S.4
-130.6
- 155 - 5
-134.7
-133.3
-133.7
-137.9
-12G.9
-123.1
-130.9
-133.4
-137.5
-124.4
-125.9
-126.9
-125.3
-122.0
(30 0)er
, S/l
Cra.iDn
5-0
5-1
> ~
.I- - j*
i~ "t
1>~ L-
5-7
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5-9
5- 1C
5-lx
5-30
5- ->i
5-3.2
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C ' ',_(- -- -(
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5-3.,
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5-12
Latitude Longitude
',3 41' 25" 116 27 '27"
43 39'47.5" 116 23'33"
43 3S'03" 116 23'33"
/ 7 } C I - C; c?! TIC, 1 /.!/,<. 1 1 -iO -JO _>_}..> .L-lLi) «L^r -fO
43 39'47.5 i! 116 25'57"
43 33 ! 03 :! li: 25'i-: i:
j ': o " ''-' ^ 'I " "> ^ ^ " i O '; ; i
43 ii'i;» nci-:^'-
£,'J 'j ( \ ! _ ~! 1 1 1*5 '' i ' ' ' ' ; '
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_;.'.- /''' ' 'I "!"!,' *~ ' 1 ' ''
' '! A 1 ' ' ' u 7 "1 9 i -" n
43 42 ! i:.5" 116 24 'C-; 11
43 4i l 45 11 116 22 '41"
43 43'^:. 5" 116 2:'3i: :1
43 43'i.o.5 n 115 25'22"
43 43 : i5 u 116 22 '42"
43 AVOG" 116 24 ! C,"
43 44 ' 25. 5 :| 116 25'3o i!
/ .. L ' 91 - -- : s i i .^ " o ' '- ' 1 1
45 43 : ^3 <.5 i: 11. L. ! 57 fi
43 42' 24" 116 2S'21 1!
43 3D : A: :I 116 29 7 34"
43 43 ! i: .5 !I 115 2C'03"
43 A r! i" :: ' i ""6 2 O! ~^"
Elav. 01
^ /, o o
2584
2487
2572
2555
2555
2523
', ~ n ~
2327
2539
2516
2:305
2546
254b
25o5
2559
2523
2142
2-519
2-5-
2532
2485
2510
9 " L z
27 So
^served ^r,
1257
1249
1252
1258
1255
1255
1271
1273
1271
1220
1257
1262
1250
12; 5
1253
1250
1237
1237
1243
1 ZuO
1260
1265
1272
1257
1236
svity
.6
.4
.8
.7
* *"T
.0
.9
.2
r
".9
.7
. 3
.0
.3
' '
.0
.9
.3
.4
.3
.7
n 1
.3
.7
.5
Bougucr g.
-94.4
-104.4
-98.2
-94.4
-92.0
-86.8.-^_ ^
L/-I . u
-83,8
-85.6
-85.2
-102.1
-98.7
-110.0
-113.5
i f^\ ' G " -L L* O o
-110.5
-i i /"» n-lio.o
-119.5
-115.2
- 9 o o
-101.1
-9C.5
-85.9
-103.7
-118.8
VCTT-
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6*601- T*C£3T C7-73 ..'C,': 911 n/.CiC5 T4? O-/.
9*901" 9 Lt6 L C06i. nOOibO iwL U>Uii-b t'/
1*601- t7*£/!.3T SOS'3 11^^7123 9TI U3*££«5^ cV
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uo.&ll:;,.. _lr.;i L.:t:itudc Lor.^izudc Elav. Observed gravity Eou^ue
C-4 43 29'17.5" 116 CS'iC"
0-5 43 29 'I/ 1 '
/. *3 O "> I O ' 1 1 ., - ,' *-r-» *-o j--.-
f - -, 11"-i-J <_/ w>^*,^
43 26'40" 115 03'1
43 27'Co" 116 01'3
9-12 43 26'33.5"
11G 01 '10"
S-13 43 13' i4" 116 C2 l C.'i 11
9-16 43 2V '13.3" 116 07 '00"
9 j. / --i.} .-I/'-. «-> !> llOvJ'Ol^iJ
9-13 _43 14- '32" 116 G7'10"
43 22 ! 47.5" 116 07 __"
i 1 6 0 / ' ^ j ' '
5" 116 C4 ; 43"
43 21'1:;.5 I! 116 04'3} i!
" 116 05 : 3; :|
3 5"! 4
3630
3372
3759
2C^3
O r c o
344ii
3414
^ _ .jo:^
^ r r *"*
-»_>. ' 2
3539
3 4 4 3
3257
~J _'-: ^.
31C7
31Co
3^9
-i ^ 1^ 'w1
3 i. 1:3
o -i , "Jl-f0
1163.6
1151.6
1133.4
1141.6
110.7
1157.9
1162.2
1160.9
1152.9
1150.0
114,. 0
1147.3
1153.5
1176. w
1174.0
1160.0
1130.4
117C.3
1174.6
1 1 70 /J. i. / ^- . -T
1175.5
-113.5
-120.6
-122.3
-124.5
-123.4
-20.7
-121.3
-123.4
-123.6
-125.6
-127.4
-127.7
-126.5
-117.7
-119.3
-117.1
-116.4
-114.0
-116.7
-119.0
-119.6
9*001-
0'90I-
L"7Zl-
S*73I-
0*931-
L'LZl-
Z*eil-
6'vII-
g*gn-
6*911-
9*331-
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3Z3e :,C7J,£0 911 ,,9C,GI ^7 IZ-OI
we nio,70 9ii ..g'og.ii e^? r>i-oi
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99ic ,^T,eo 911 ,,g*6g,03 r^7 7-01
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3663 ,,70,01 911 ,,93,73 ^ ^C-G
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TOie ,,II, CO 911 ,,93, v3 C7 r^-G
S73C ugo.eo 911 u^.c-:- :T r:-'
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10-22
10-23
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10-25
10-27
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10-2;.
10-30
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12-1
12-1
12-3
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12-6
12-7
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13
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13
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14
14
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14
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22.5"
'07.5"
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'33.5"
'23.5"
'30"
22.5"
03"
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f 0 2 "
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! 53.5 !1
Longitude Hlcv. Observed gravity
llo
116
116
116
iij
115
116
116
116
116
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
OC
05
02
03
04
02
01
CO
00
00
--
99
50
51
50
52
c^> .>->
53
54
~>'^'
57
c -S*~>
59
59
59
58
'30"
40"
' 14"
'56"
'10"
' i ( n
'02"
i / '-n -_- ^/
I /t 1 i r
'31"
26"
'14"
'07"
i ', -. 1 1T >
1 , 0 1 1O s
f 0 ' II~f A.
1 J,_ '' 1 1
53"
i - ii
i ~ -, i :* ^.
.331,
'44"
! 44"
: 44"
'33"
3166
3172
3127
3227
3240
3134
3102
3111
3130
3149
--
3189
3193
3221
*"> 1 O '->^3->
3153
3.44
2167
3145
3123
3113
3099
2092
3076
3073
3071
1102.
1179.
1179.
1185.
IluO.
1194.
1192.
1182.
1176.
1171.
1151.
1176.
1179.
!ll7S.
1174.
1180.
1135.
1179.
1183.
1186.
1138.
1191.
1194.
J199.
1202.
1204
5
3
8
5
i\
9
0
4
r\
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0
7
3
4
7
3
5
1
7
6
2 '
-r
4
2
3
3
o.->
Bouguer g.
- 1 04 . 9
-108.5
-107.3
-,3.9
-91.5
-89.9
-94.1
-104.5
-110.7
-116.1
--
-100.9
-97.2
-96.9
-101.4
-100.5
-96.1
-101.3
-93.7
-97.1
-95.8
-93.6
-91.3
-85.4
-81.4
-79.9
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14-37
14-33
I-'.- 39
14-40
14-41
14-42
14-43
14-44
14-45
14-46
14-47
14-43
14-49
14-50
14-51
14-52
14-53
14-54
14-55
14-Jo
14-57
14-53
14 -5S
14-60
14-61
Latitude Lon3 ituca
43
43
43
43
/ --i
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
04
05
Co
03
07
05
05
04
03
02
01
01
01
02
03
02
03
03
03
00
01
01
01
CO
00
'52.5"
'51"
'44"
02"
36"
~ r; \ t
01"
"09"
'1C. 5"
'25.5"
32.5"
'34.5"
'35.5"
'16"
19.5"
'57.5"
'19.5"
17.5"
'17.5"
'/:.(}"
32.5"
'31"
'51"
'40.5"
"36.5"
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
42
42
42
42
44
45
45
45
45
45
45
47
43
50
50
51
48
40
44
42
42
41
40
40
39
'04"
'05"
59"
32"
'20"
22"
i o?"
'21"
'19"
19"
"18"
OS"
56"
! 03"
03"
'40"
t 92"
'59"
'09"
'50"
53"
'46"
'36"
'35"
25"
Elev. Observed gravity
3089
3097
3134
3144
5152
3144
3122
3101
3086
3049
3035
3029
3042
3013
3026
2990
3059
3061
30S1
3055
3046
3047
3064
3049
303?
1183
1185
1184
1176
11G5
1192
1195
1196
1195
1194
1193
1193
1191
1195
1200
1198
1200
1199
1194
1138
1191
1188
1187
1184
1182
.5
.2
.2
.8
.0
.4
9 2
.1
.2
.2
.3
.9
.5
.4
.7
.5
.5
.6
.1
.9
.5
.5
.7
.3
.5
Eougucr
-82
-86
-06
-95
-EC
-76
-74
-73
-73
-75
-75
-75
-77
-76
-71
-75
-70
-70
-75
-77
-77
-79
-79
-82
-85
s
.6
.8
.9
.6
.3
.8
.0
.1
.6
.5
.9
.8
.4
.3
.8
.5
.0
.7
.0
.8
.0
.9
.3
.8
.1
(100)R^crn^O. & 1 1
C,^icn
l/:-f:2
1 4 3
1 4 - J4
_. . - .-
«. T "" / T
14-75
14-75
14-77
14-73
14-79
14-SO
14-31
14-32
14-83
14 r 34
14-85
14-G6
14-37
1 ' _ o
14-59
14- vO
14-01
1 /. r. <->^i.;. j _^
14-33
14-S4
Lctiuude
43 02 '22"
43 03 'I'-. 5"
43 C4 ! 09"
43 C5'22"
43 CO'23 1 '
43 09 '20. 5"
43 07'37"
43 05'30.5"
43 C4'10.5"
43 04 '12"
43 04'27"
43 05'20"
43 04'11"
43 05'01"
43 05'00.5"
43 04'09"
43 05'52.5"
43 06'44.5"
43 08 '29"
43 09 '20. 5"
43 09 '40. 5"
43 03 '41"
43 07 '45"
43 07'58.5"
43 07'40.5"
Longitude
115 41'47"
115 41'46"
115 42 '57"
115 43 '50"
115 40'37"
115 42 ! 24"
115 43*36"
115 51'19"
115 51'13"
115 50'03"
115 4C'5G"
115 47'47"
115 47 '46"
115 46'34"
115 42'5o"
- 115 44 '09"
115 42'59"
115 44 '10"
115 43'33"
115 44 '11"
115 45 '44"
115 4&'3S"
115 46*37"
115 48*13"
115 49 '42"
Elcv. Observed gravity
3054
3065
3075
3043
3172
3184
3156
3072
3031
3049
3109
3129
3094
3112
3092
3080
3111
3141
3172
3197
3207
3234
3206
3212
3165
1190.7
1191.7
1194.2
1189.4
1164.0
1167.5
1181.9
1202.3
1202.0
1202.4
1201.6
1198.9
1200.5
1193.3
1191.1
1195.5
1188.0
1187.0
1179.0
1175.9 '
1178.1
1183.9
1186.4
1189.6
1197.5
Bouguer g.
-78.7
-78.3
-76.5
-79.3
-107.5
-104.5
-39.2
-70.7
-71.4
-70.0
-67.6
-70.4
-69.1
-71.5
-79.9
-75.0
-83.2
-83.7
-92.5
-95.4
-93.0
-84.1
-81.9
-78.7
-73.1
(300)
n£* S 1 1
St. .'i*. ".».QTi Lctitu
14-95
14-95
14-97
14-99
14-100
14-101
14-102
14-103
14-104
14-105
14-106
14--107
14-109
14-110
14-111
14-112
. 14-113
14-114
14-115
14-116
14-117
14-11G
14-119
14-120
14-121
14-122
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
07
09
10
03
10
04
03
03
02
03
05
06
05
04
05
06
05
01
01
CO
CO
02
00
01
01
03
de
'10"
02"
'06"
19.5"
'16"
'43"
'57"
'21.5"
52.5"
'53.5"
'15"
32"
56"
« A 0 1 1LrJ-
'53"
'35"
'26"
'38"'
'37.5"
'12.5"
'£.1 C|t
29"
'35"
;C3"
'36.5"
'01"
LonS i
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
Ltudci Elev. Observed gravity
52
49
48
47
46
53
56
58
59
59
59
53
57
57
56
54
-A
59
57
57
55
53
51
53
55
55
26"
'26"
24"
'36"
'45"
41"
'17"
'02"
35"
'34"
'39"
56"
'59"
'59"
« i "~>\i
'03"
'53"
'24"
i 7 A ii
'24 n
57"
'41"
"39"
'48"
! 37"
! 45"
3094
3158
3163
3241
3176
3024
2976
2943
2933
2944
2973
2979
3001
2977
2987
3065
2993
2SS9
2915
2398
2963
2933
2971
2930
2934
2975
1207.
1192.
1185.
1183.
1130.
1204.
1200.
1195.
1188.
1196.
1206.
1208.
1206.
1203.
1203.
1207.
1206.
1184.
1184.
1174.
1177.
1193.
1134.
1/84.
1183.
1195
7
6
9
4
4
5
0
0
6
7
1
4
3
2
0
6
2
7
6
Bouguer
-66.
-80.
-88.
-85.
-93.
-70.
-76.
-82.
-88.
-81.
-72.
-71.
-71.
-74.
-70.
-67.
-71.
-94.
-91.
S-
5
5
2
1
4
3
3
4
4
5
5
7
6
3
7
5
4
6
9
4 ' -101.2
4
4
6
8
5
.6
-94.
-80.
-87.
-87.
'-88.
-79
9
1
0
1
9
.5
. S 1 1
Ct "" icn
1-.--123
14-124
14-125
14-125
14-127
14-123
14-129
14-130
14-131
14-132
14-133
14-134
14-135
14-136
14-137
14-133
14-139
14-140 -
14-141
14-142
14-143
14-144
14-145
14-146
14-147
14-143
Latitude Lonf it'UG 0
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
03
05
04
05
r "7
07
05
04
03
04
03
03
01
00
00
01
02
03
03
04
04
09\
03
08
07
07
'47"
'10. 5"
57"
02"
i '; ": Til
i nr 1 1\-> */
! 40"
'40"
' 24"
'48"
57"
'13.5"
'30"
' 22"
1 T_pl
'30"
"22"
'14.5"
'14.5"
! 05.5"
'53"
1^311
'42"
'20"
54"
53"
115
115
115
115
115
115
115
115
115
115
lib
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
53
35
O 0
33
- I
31
32
30
30
32
'i i j j
33
32
32
i '._>-v
34
34
34
35
35
*^> fJ-r
35
36
35
33
32
'41"
! 52"
'30"
25"
r " > i ;
'51"
'03"
'46"
'15"
'06"
1 ?7i»
I 2911
'20"
'42"
' 25"
40"
39"
27"
'57"
1 £1 11
' 3 ~ "
26"
20"
'41"
25"
05"
Elev. Observed gravity
2985
3205
3204
3312
3393
3354
3274
2256..
3206
3234 .
3216
3183
3117
3041
3063
3121
3151
3168
3166
3191
3198
3460
3441
3374
3424
3416
1202.
1156.
1146.
1137.
1131.
1125.
1136.
1136.
1149.
1142.
1152.
1157.
1172.
1131.
1177.
1172.
1168.
1162.
1167.
1161.
1150.
1125.
1131.
1133.
1124.
1119
3
3
8
4
1
8
4
5
4
12
9
9
7
7
3
9
8
0
3
7 .
6
3
7
2
2
.8
Bougucr
-73.
-108
-117
-121
-125
-131
-124
-124
-112
-120
-109
-105
-91.
-85.
-88.
-91.
-94.
-101
-96.
-102
-114
-130
-124
-125
-131
2.
3
.2
.4
.9
. 1
.9
.7
.0
.4
.1
.1
.0
6
4
2
1
7
.8
7
.1
.0
.0
.0
.9
.3
-136.1
aoo)
: . r.
i.'-f
14-
?'.__
"J.-
n '
T ' _ .i' .-
K-
1 A-
14-
.J.cn
149
150
151
152
153
154
155
156
157
14-158
14-
14-
14-
iJV
160
161
14-162
14 r 163
Lati
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
.izude Longitude
07
OS
09
09
10
j. i.
; 45"
39"
i v; ii
53"
1 35"
'20"
11 '49"
11
- r\
1J
11
>j. j.
13
13
T < > iO
13
i 9 r. iit- j
47"
'39"
'G0' !
'06"
'40"
'40"
"55"
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115
30
30
31
31
32
33
32
31
34
33
> r _;u
36
"H -7
-> /
45
52
26"
'47"
'18"
37"
18"
' 11"
! 15"
'09"
'12"
'5£ n
'5G"
' 25"
1 GO"
'53"
'00"
Elev. Observed gravity
3443
3530
3578
3722
3728
3754
3320
4046
4362
3747
3475
3748
3793
3525
3330
15-.0 -- -- .
15- /. +
15-5
15-
15-
15-
16-
Ic-
L o
10-
16-
so
7
-
w
-
2
2
4
43
43
43
43
i -»
43
43
43
43
43
IS
IS
17
li
16
°.^.i-O
20
21
22
21
'31»
'07.5"
07"
'30.5"
i 23 !l
54"
'34.5"
'27.5"
'IS. 5"
' 27"
116
116
116
116
116
116
116
116
116
116
OC
OS
08
OS
r-. "i\_'O
06
10
10
11
'00"
"07"
' 12"
'11"
11"
'30"
' 11"
i OCJM
"36"
11 '41"
3227
3244
3311
3342
3344
3133
3107,
3070
2972
3029
1114
1112
1109
1101
1103
1105
1103
1083
1078
1109
1127
1113
1112
1145
1150
1152
1180
1182
1180
1184
1181
1179
1186
1188
1195
.6
.3
.4
.2
.0
.7
.2
.8
.7
.0
.6
.1
.5
.2
.7
.6
.9
.1
.6
.9
.4
.4
.6
.2
.4
1192.6
Bouguer g.
-139.5
-138.0
-138.3
-139.4
-138.2
-135.1
-134.3
-139.7
-129.3
-132.7
-129.4
-130.7
-129.5
-120.2
-126.9
. __
-102.8
-99.5
-95.4
-86.9
-91.6
-113.0
-106.9
-108.8
-108. 8
-106.9
(AOO)
C^niiirn L-.-iitudc Lonsituda Elev. Observed gravity
15-5
16-5
16-7
i i ~ V
1 : j
-- o i- .,
~i t ^. w ->
1G-4
18-5
18-6
lo-7
1 r. o o-u ..
18-9
18-10
18- ir
1C- 12
18-13
18-14
1C- 15
-, r __ -. <
^ L. 1
i: -is
A o i. }
13-20
1C- 21
18-22
43 20'35"
43 18 I 52.5"
43 17'C0.5"
43 21'24.5"
43 18'47"
43 14 '38"
43 14' 02"
43 13 : 3i"
43 12'01"
43 11 '24. 5"
43 09 '43"
43 08 T 31"
43 OS'10"
43 OS'35. 5"
43 09 '58"
43 10'49.5 tr
43 12'46"
" 43 12 I 33.5"
43 12 i 53.5"
43 12 : 53.5"
43 12 I 53.5"
43 p'16"
43 11'39.5"
43 10'15.5"
43 09 ! 25 IT
43 C9'GO"
116 li'4l"
116 11 ! 21"
115 11 '16"
116 07'32"
116 Gl'10"
116 00'56"
116 01 '01"
116 00 '54"
116 01 '01"
116 00'59"
116 GO'32"
116 01 T 02"
116 01'5S" &
116 02'40"
116 02 '35"
116 C2'C9"
116 01'27"
116 02'11"
116 03'25"
116 C4'35 !1
116 05'47"
116 06'32"
116 05'57"
116 05'43"
116 05'45"
116 04 '24"
3032
3168
3255
3105
3149
3094
3090
3169
3073
3065
3214
3104
3074
3072
3077
3064
3081
30C4
3148
3137
3256
3285
3182
3085
3026
3040
1193.8
1191.3
1189.8
1182.1
1170.2
1193.7
1202.6
1195.0
1208.2
1208.6
1198.2
1203.3
1203.6
1202.8
1210.3
1210.5
1205.9
1206.3
1202.4
1201.2
1196.4
1193.5
1202.1
1205.6
1203.9
1205.6
Bougucr g.
-104.2
-96.0
-89.4
-112.7
-118.0
-86.6
-82.1
-84.1
-74.5
-73.7
-72.6
-72.3
-73.2
-74.9
-69.1
-70.9
-77.4
-76.0
-77.1
-75.9
-76.6
.-78.3
-73.5
-73.7
-72.7
-74.6
6*7^-
70 o L
'
-OIL
Gic
me
TICC
T r, "v f 1 T T r - I J _ y ;. L r. :
z
£
0
0
L
'SL-
£/_-
/ - ~
T / _I- '_
"1^-
G'vOoI
0'906l
C'GOUI
I'oT"!
VIToI
£*!/.-
G'T/-
O*!/.-
£*OS-
^'63-
£'G6-
jonCnog;
9*9031
9' '/OUT
,^r/ .^ J k. L
900^:
99Go
IC
9IZ
f;?'GI,C: ^7
SET^ :-.-; : ..G? 9TI -r:/7,C: E-7
7": 7." "7
7 7 '-
ii_'Jj/.U
i:; _ : :. L ;. 7
C+7
(oos
(AOO)
Ll-r^ic:* Latitude
19-17
10 ^ o V-iO
1S.-2S
- .-. o
2C-0
20-2
20-3
20-4
20-6
20^7
20-8
20-9
20- .
20-11
20-12
20-13
20-14
20-15
10- 15
11-0
22-0
23-0
24-0
24-1
24-2
43
43
43
43
43
43
4 *\3
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
Co
07
03
10
16
i r
14
12
12
11
11
10
09
10
08
07
11
12
12
31
22
20
14
14
14
"05.5"
37"
'2,. 5"
13"
j j.
'23.5"
'21.5"
1 jCM
'54"
"08.5"
CO"
'04.5"
'13.5"
30.5"
' i "\ ci" ^. j . j
'29.5"
'37"
'05.5"
1 02 "
I C /. ! 1
'03 !I
35"
'C3 :I
20"
'27.5"
'15' !
Longitu
116
116
116
116
116
116
llu
116
115
116
116
116
116
116
116
116
115
116
116
116
116
116
116
116
116
116
1C
10
10
10
o:
10
11
11
11
12
13
14
12
11
13
12
14
14
14
23
o/,
o /4,-t
22
21
19
ce
'22"
! 29"
'29"
'29"
'56"
i " .-. 1 1
i 9 - ; t
'41"
'41"
'55"
( 53"
05"
'03"
'20"
'40"
'27"
'52"
'03"
'04"
C4"
'35"
'42"
'42 !J
'01"
'10"
'26"
Elev. Observed gravity
2990
2921
2996
3105
3349
3305
' 0 q- ~>-t L
O O /, "
3155
3153
3151
3055
3044
3089
3003
2937
3117
3453
3421
2580
3120
2910
3018
3014
3095
1204,
1205,
1205,
1206,
1182,
1189,
1185,
1196,
1199,
1207,
1205,
1204,
1201,
1205,
1206,
1199,
1200,
1203,
1185,
1183,
1232.
1207,
1219,
1204.
1208.
1206
.3
.5
.5
.6
.0
.7
.5
,0
,8
,4
,2
,6 '
.6
.7
.8
.2
.3 .
.4
.1
.4
.3
.4
,0
,1
,8
.6
Bouguer
-77.
-79.
-76.
-71.
-90.
-85.
-85.
-78.
-74.
-69.
-71.
-72.
-78.
-74.
-72.
-82.
-83.
-75.
-74.
-74.
-102
_ << °
-85.
-85,
-81.
&
5
7
5
5
9
6
5
0
1
0
3
0
9
9
2
4
9
3
8
7
.6
2
A^
3
1
-78.1
(3 0 0)
L- -.".,; ion juu'-itude Longitude
24-
T-
" '
24-
~t~
14-
o/ _
24-
24-
24-
24-
24-
24-
24-
, o
/;.
J>
6
7
o
r.
10
11
12
T r:i J
14
15
16
24-13
24 - 19
24-20
24-21 -
M-
7 L-
24-
24-
24-
24-
24-
24-
n 0
-I .j
*-\ /_
25
/^ s-
27
<"> r. O
^J
43
43
43
43
43
43
43
43
43
/, '< i ~i
43
43
43
43
43
43
43
43
43
43
43
4°
43
A 1
43
43
14
14
14
13
12
12
13
12
12
11
11
11
12
11
1 ^O ril * . -J
43"
1 OO Cll-<O o D
t 79U
t r'O rirJ-; * _
i - o c; ii
I 'J r :;;i
'43"
'05"
"43"
'Go 11
'50.5"
'43"
'51"
12'47.5"
13
14
15
15
16
i ^
15
16
16
16
16
"35"
'59.5"
! 31"
: 26"
1 -; o r?j
t / ' ri!"^ r . *
'59.5"
'53.5"
i . "", i',
i '.; ^ ; i
'31"
116
116
116
115
116
116
116
116
116
116
11C
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
1G'09"
16'26"
15 '15"
15 '27"
15'27"
16' 25"
- ,c : o r , i-VJ ~>
17 '24"
16 '25"
15'26"
16 ':..."
17 '4-1"
19 '10 11
19 ' 1-,
20 '54"
21 "29"
22 '1G"
21 '55"
21' 09"
1 O ' "V : i
-\ ^ \ '. ^\\i o'
1 0 1 '. n 1 1 lu TO
16'22"
15 '24"
15'21"
13'4C"
Elev. Observed gra
3160
3177
3191
3201
3163
3135
315S
3101
3072
3063
2996
3011
3055
3019
3007
3005
2953
2954
3007
3043
3CSO
3093
3131
3164
3254
3273
1205.
1205.
1204.
1204.
1205.
120S.
12CG.
1203.
1207.
1207.
1206.
1203.
1205.
1203.
1205.
1206.
1203.
1212.
1209.
120S.
1203.
1206.
1205.
1203.
1196.
1196
.vity
1
7
7
9
5
1
3
6
2
5
7 .
9
1
0
9
1
7
0
6
5
7
8
3
9
7
.3
Bou^uer
-76.
-74.
-74.
-72.
-72.
-72.
-71.
-73.
-75.
-75.
79.
-77.
-78.
-82.
-81.
-83.
-85.
-83.
-82.
-32.
-81.
-SO.
-SI.
-79.
-81.
-81
s.
1
7
9
1
1
2
6
4
6
4
2
2
7
7
9
0
-»
1
1
r\
9
6
2
6
8
.2
f - ,% J- - 4./ W ., W J-Wli
2 A- 20
?.!:.- ° *>
2'':~33
24-34
24-33
24-36
24-37
*1 ' *"V /%' _' - S "*
24-39
24-40
24-41
'> / /, O^ -.- *-( £.
24-43
24-44
24-45
24-45
24-47
24-43 -
24- 4 j
24 - J l1
24-51
::/>-52
24-53
*" / f '.
24-55
0 '- _ r- ^
Lc^:
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
if..:
16
17
16
17
17
17
>. ,
17
IS
20
1 :J
IS
IS
17
17
17
19
20
21
22
20
~\ <~> \
19
20
21
21
UG
'11"
'53"
'56 .5"
» -. r 71
I CO CM-'v-' . J
J r- o ;i
'53 :I
«10"
: 47"
01.5"
2J.5"
55"
41.5"
'59"
'29.5"
'51.5"
'26 B 5"
1 "* 3 c "
'02"
'C1.5"
'09.5"
r 42 c 5 I!
roi. cti -> o . ^
'35 !!
01"
22"
Loncitucle
116
116
116
116
116
116
115
116
116
116
11C
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
12
12
12
17
13
20
O"
21
20
20
T /
17
15
15
14
14
12
13
13
13
14
15
IS
16
17
18
'31"
'36"
40"
05"
1 5?"
IS"
l :o n
, 15 n
t /. nji
\-\nwlo
i 2ju
'10"
'56"
'16"
17"
<04"
'53"
08"
"31"
'40"
23"
'01"
'20"
28"
<2S"
46"
Elcv. Observed gravity
3232
3261
3497
3079
2982
297S
2910
2535.
2390
2339
2946
3062
3137
3178
3269
3163
3129
3092
3010
2932
3129
3050
3052
3010
2959
2389
1195.
1189.
1175.
1207.
1214.
1211.
1215.
1211.
1216.
1215.
1212.
1206.
1201.
1199.
1192.
1196.
1194.
1195.
1199.
1202.
1197.
1205.
1205.
1207.
1211.
3
5
5
4
1
7
5
1
9
2
9
1
0
6
3
5
8
0
0
4 '
6
1
9
6
7
1214.8
Eouguer
-81.
-<>0.
-89.
-83.
-S3.
-85.
-85.
-84.
-86.
-90.
-38.
-87.
-87.
-85.
-86.
-91.
-95.
-98.
-101
-103
-93.
-90.
-89.
-91.
-91.
0»
1
7
1
9
0
8
9
6
9
5
6
6
9
8
9
0
7
8
.0
.8
9
5
4
8
3
-93.0
(£00)
.;^_:.u5c: Lcnsiu^de Zlcv. Observed gravity
43 21 '23. 5" 116 19 '54"
/" "* "" ' Q7 c ' 1 ~ ' ~ ~ ' ' r ':
A / 1 0 t '. '. r it - - ,- -: ; l .-- <- u -r_> _/ _ -. ^ . _/ **O ~ _,^/
4/, o ^ "."-'?: - - '. - : t p -. 1 1
/ 'j 9 ' t «~, - r ; . - ~, <- T r 1, o r 1 1 -,-_> J. . -^ , -, *_O a-_> -/_>
43 2: ! 55.5 ;! 115 15'25-
f ,, ,, - ; , ^ ;. " "! 6 "I"'''-'''
-. v 7 ' j '- J "16 " 7 : 2 5 ' :
'^ ',-! - rts T1 1; T ~ I ' 0 1 1 >-.--> _ / _( ^ . _; i 1 0 i O -.-
' ' <j i " r i: -. -, - -.'!.".-::- , _- ... , _- ^ . ^ J. * \ / ^- W Ju
^ 5 ' " : ^' 5' ! " a. i "'"''"' "
_//. , i '. 711 -\ > :. ' t ') ^M
41, L:.-:- ii6 ;. :- _/, . ':<' - E;II T T ' o-> i r.^ii
/ ' i , ' i ') ; i i i /; c ; i 1 1
A 3 i "; ' 39" 1 6 20 ' 5w' :
43 2v'l.» 115 15'45^
43 2: lu.'S' 8 115 IS '12"
45 -I '^0" 116 14 ! 55 ;:
45 25 '41-' 116 15<12"
45 L.^45.5 11 115 15 '27"
/. o -7 c ; ^ 'i " : ', '! ' ! ' " ; '
43 2S'.i" -.:;i?':.-^ 3 ':'5 ! -'- r- :i ""6 15 : -T; !i
Z.. 3 2 5 '-''-" 5 n I ^ '~' i 9 ' " 9 ' T
2370
2924
2067
2002
2910
2£S1
2512
2789
27S7
2762
2721
2751
2725
2777
-313
2527
2543
2552
2916
2S24
2201
2772
1215. 6
1255.7
1210.4
1197.6
1209.0
1212.1
1207.1
1212.6
1215.7
1213.0
*. ° ° ~!
122; . -
1221,0
1225. 2
1220.3
1217.6
1215.5
1213.0
1200.2
1203.6
1205.1
T O Q O O
1211.5
1215.3
1215.9
Lcuguer 2.
->3.4
-84.6
-115.8
-111.4
-109.5
-103.6
-109.5
-10S.8
-107.6
-106.4
-105.1
-103.5
-102.9
-105.1
-104.3
-105.0
-107.2
-107.9
-107.5.
-lll.C
-113.6
-109.7
-10S.5
-107. 5
-105.7
-103.9
(AOO) R^cr»tt^o. 5" 1 1
l_...t:icr. Latitu
2 ", - 7
-I/ -o
27-0
«_,' - c/
."" - 12
.1' 7-11
2: -I':
1- / - 1 6
' ~ ". 7 _ . _ /
2.'- ;.-,-
27-^
27-2C
27-21
27-22
9 '. _ "V °
27-24
27-25 -
° 7 - ° 6
27-27
27-2S
2J-0
2J-1
2J-2
.'. - -i
' ; _ .'
43
43
L'
L "*
43
43
43
43
A3
43
/;!
43
43
43
43
43
43
43
43
43
43
43
L"
43
43
43
2C
27
26
25
0-7
22
23
23
23
2-:
24
24
24
25
24
23
22
22
22
24
27
26
25
24
24
ce Lon^:
'41.7J"
'07"
1 14*5"
i n on
'32. 5"
19"
: 44"
'37"
: 37"
'.;:>. 5 M1 r ; 1 1
<C1"
'55.5 I!
: 4G.5"
1 20 . 5"
: 33 , J
43"
i /. < i i
'46"
30"
'30"
'41.5"
'49.5"
<57"
'GV.5"
116
116
116
116
116
-I T .t
116
116
116
ilG
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
Ltude
21
22
22
19
15
14
T C
16
15
1 r
16
1C
1C
13
19
19
19
21
22
22
34
33
34
33
34
'10"
23"
1 23"
'59"
I ; -.] i
' r, 1 1
1 T "~, -i
. 25 "
'I'"
t -, -- I!
'25"
1 T " n
'47"
4C"
'5-; M
1 56"
I q^JI Jo
1 1 "> "
'24"
23"
19"
IQ9»
19"
'09"
'20"
Elev. 01
2791
2803
2791
2816
2939
2919
2CS6
2354
2833
2.91
2861
2328
2302
2806
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1203.
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1215.
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C_::':ion Latitude Lor.2itude
2G-11 43 31'55. 5" 116 33'07n
US -12 A3 33'42" 116 35*31"
2i-13 43 34 ! 34" 116 36*43"
:.>14 43 34 '03" 116 37 '55"
2-;- 15 43 35'25" 116 37*55"
10-15 43 37 f 10" 116 37'55"
2v-17 43 36' 1C" 116 39 '07"
29-13 43 37'08" 116 40*13"
29-19 43 36'15.5" 116 41*32"
29-20 43 36'50" 116 42'43"
29-21 43 37 '05" 116 44*53"
29-22 43 36 '14. 5" 116 43*55"" -\
29-23 43 35*20" 116 44*43"
29'f24 43 35 '41" 116 42 '43"
29r25 43 35*23.5" 116 40*55"
29-26 43 34*31.5" 116 40 * 20"
29-27 43 34*59" 116 39*07"
29-23 - 43 33*14.5" 116 38*27"
29-29 43 32*57" 116 36*43"
25-30 43 31*56" 116 35*31"
2-J-21 43 31'03" 116 34'1S"
29-32 43 30'11" 116 35*31"
29-33 43 30*37" ' 116 36*42"
2>34 43 31*03.5" 116 37*55"
29-25 43 30'10.5" 116 39*07"
29-36 43 31'02.5" 116 40'20"
Elev. Observed gravity
2519
248G
2458
2490
2451
2436
2444
2432
2599
2515
2509
2502
2506
2550
2561
2637
2463
2554
2540
2577
2534
2543
2547
2589
2765
2755
1252.7
1255.7
1257.9
1254.9
1259.7
1265.8
1261.8
1264.4
1249.3
1254.5
1253.1
1252.3
1249.7
1249.9
1251.5
1244.8
1257.6
1249.4
1250.5
1247.1 -
1251.2
1248.5
1248.1
1245.2
1229.9
1232.4
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30-16 43
01-17 43
' ' _ " ~> L '-~, *J +. o *v~>
00-13 43
00-20 43
00-21 43
V.'-'rj 43
00-04 43
30-00 43
1/0-1.6 43
00-07 43
3u-LJ 43
Ovj-20 43
0 0 - 0 U 4 3
1,0-01 43
Oc-jO 43
io-_o 40
0 0- 1 ; 43
~ ' j - _. 3 *-r J>
'".'.' / C
00-07 43
30-3- 43
Jo
41
43
42
A 1 4t 1.
41
41
42
44
0 /'
37
36
35
}/,
35
36
^ ',~«j
35
JT
34
_/ o
J w
: .->
39
40
' <;,cii-, v>
1 "3 OH->
03.5"
'39"
1 O 0 CM ~> - % J
'50. 5"
'02.5"
'32.5"
'26"
GJ.5"
1 ; 1 II
'11"
15"
'26"
l r > r 1 1_^^-j . J
l ^ i\ --; 1 1 -> O . -J
'33.5"
'19 :f
'13.5"
: 30"
1 ' 7 Cll
20"
i .<-> - uW a.
1 1 -711_< /
'13"
03"
110
116
116
116
115
JL .4.O
116
116
116
116
116
116
116
liu
116
116
116
116
116
116
116
116
116
116
116
116
_>3
36
37
35
"3 '. _<-t
o '
31
30
00
30
-> ~>
35
06
35
^ A - ^
02
31
00
30
00
31
Jc-f
3 O
39
40
41
1 P O II
'44"
00"
30"
i > ^>ti A. t^
i .- -- M - ^
1 T^ 0 1 1
"42"
42"
'00-
i '4 '> 1 1
'43"
1 "7 ^ II
'10"
1 ^ "- 1 1_> _ '
'55"
40"
'T -J
'Cv"
I K - | 1 _/ ^1
i n c 1 1
37"
1 O C 1 1
'20"
i -^2"
Elcv. Ob
2459
2397
2465
2410
2420
2436
2442
2461
2457
2599
O ', ' '(
2456
2452
2-t uo
2401 '
2516
<-) / r ' Z-tuO
2403
2569
2559
2511
2462
2409
2397
2402
2369
served gravity
1273.
1282.
1276.
1279.
1273.
1275.
1274.
1271.
1270.
1256.
1267.
1266.
1262.
1260.
1259.
1260.
1265.
1266.
1257.
1256.
1258.
12-64.
1270.
1 9 73A. * / W O
1273.
1278
7
7
8
3
5
0
1
6
0
1
4
6
9
4
^
2
5
ij.
8
5
1
2
6
0
9
.6
Bouguer
-86.
-84.
-89.
-89.
-87.
-90.
-90.
-92.
-95.
-103
-89.
-90.
-93.
-93.
-93.
-91.
-09.
-87.
-90.
-90.
-92.
S«
2
8
0
2
7
9
S
1
3
.3
5
9
5
7
5
4
4
0
0
,9
2
-91.7
-91.
-90.
-89.
0
2
9
-88.5
(300)Rjfcr
»_ - . on
: - ;-32
30-40
20-41
?. 0-42
3-: -43
30- -.4
*"','' ' f
30-43
30-47
- / _/ I1 '
3.-49
30-50
30-53
30-54
3.0-55
'.' _ r , "
30-57
30-53
3C-59
- - j'j
.-.-61
^0-32
U-63
31-C4
30-35
30-06
Latitude
43 39 '05"
43 33' 25"
43 38'00.5M
43 3/; 32"
43 37'03.5"
43 37 '03"
43 37 'C5 11
43 3. '11"
43 3-3 '11"
43 35 '19"
43 35 '19"
43 34 '01"
43 35 1 45.5"
43 36'11.5 U
43 44 '00"
43 44 '02"
4344'OC"
/, '- /. /. I ,'" > CM *-r _* 'T -r U o . _;
'. O A 1. I ' v ; II
43 ^.^. ' ' '? "
4 3 -( -.- L O "
43 45 ' 00"
/, 0 A r I -> -M |
43 45'00.5"
43 44 '57"
43 44'CO"
Longitude
116 43 '55"
116 45'06"
116 42'07"
116 43'55"
116 47'30"
116 ^0 ! 03"
116 52 '14"
115 51 '12"
116 48'40"
116 49 '33"
116 47 '29"
116 47'29"
116 45'42"
116 46 '53"
116 36'42"
116 35'30"
116 34 '1 7"
116 33 1 07"
116 31'55"
116 37 '54"
116 39 '04"
116 39 '04"
116 40'13 !I
116 42'06"
116 45'OS 11
116 45 OS"
Elev. Observed gravity
2397
2472
2456
2519
2503
2651
2403
2290
2431
2233
2402
2348
2522
2532
2454
2511
2555
2533
2626
2461
2436
2465
2493
2462
2392
2370
1268.4
1259.1
1263.1
1254.9
1250.5
1237.1
1252.3
1252.0
1251.6
1262.1
1253.3
1253.8
1248.3
1247.2
1274.8
1263.7
1263.7
1259.8
1255.3
1276.5 -
1281.2
1277.3
1278. /
1284.3
1293.3
1292.2
Bouguer g.
-95.5
-99.3
-95.6
-99.4
-104.0
-100.5
-10C.O
-107.9
-105.9
-106.0
-104.6
-105.4
-103.2
-104.2
-93.3
-95.9
-98.3
-100.6
-102.5
-91.2
-88.0
-91.4
-88.9
-84.6
-79.7
-80.9
(joo)
^^r.'^icr* L:--iiudc Longitude
' ' -\>~t
30-68
r-\ f -JU- .
30-70
30-71
- f -j<)~t ^ i ..
: t 7 ', _/ w- /_»
_; v^ /H-
J> >_/ .' LJ
30-70
30-77
30-70
30-79
t r\' ' >{*^>Or oU
30-01
'- ' _ " °
-i <j~ oJ
-> <^ 1-"-r
-i (..' "" W _*
1' J-00
- - - /'
o:-co
00-^^
-j : J > v'
.> 0 ' / x
30-^2
43 43 '13"
43 44'07.5M
43 43 ! 14"
43 44'07.5"
43 43 '15"
43 42 1 22.5"
43 41'20"
43 41'54.5"
43 42'30.5"
43 43 '10"
43 43'52"
43 44'21.5"
43 44 '43"
43 45 I 58"
43 46'40"
43 44 '31"
43 43 1 11.5"
43 41 "26"
43 39 '41"
43 37 '56. 5"
'.i ' n ' -"i "? s < i»-i J -T U *J U . J
43 39'U.5"
43 39 '04. 5"
43 46'40"
43 50 '00"
43 49 'IS"
116 43'54"
116 42'42"
116 41 I 3S"
116 40 '54"
116 38 I 29"
116 39 '43"
116 41 '12"
116 43'19"
116 45'07"
116 46 '56"
116 49 '00"
116 50 '38"
116 57 '44"
116 53 '24"
116 55'44"
116 56'27".
116 55 '51"
116 55'52"
116 55'5I"
116 55'5i M
116 53 '27"
116 51'05"
116 46 '54"
116 47 '34"
116 5C'26"
116 5C'04"
Elev. Observed gravity
2372
2453
2471
2423
2447
2382
2366
2344
2333
2314
2303
2287
2279
2245
2236
2270
2407
2413
2236
2272
2439
2485
2448
2415
2765
2455
1288.4
1285.5
1281.5
1285.0
12S0.1
1235.7
1283.7
1284.8
1286.1
1287.8
1287.2
1236.1
1285.3
1285.7
1285.9
1276.8
1264.3
1256.6
1260.7
1258.7
1256.2
1255.2
1260.8
1295.0
1271.3
1279.9 .
Bouguer g.
-83.2
-82.6
t/^-r . Z.
-84.9
-87.0
-84.0
-85.4
-86.6
-86.8
-87.2
-89.6
-92.3
-94.2
-97.7
-99.0
-102.9
-105.1
-109.8
-110.8
-111.0
-106.7
-103.7
-100.0
-79.2
-86.9
-95.9
(aoo)
- '--
-J '~
30-
- 3-
IC-
3C-
Ju-
._ion
1-3
94
> l>
06
;/
:j
S9
31-0
Latitude
43
43
43
43
43
43
43
43
54
57
59
57
56
54
47
37
'34"
1 22"
46"
'03"
'44"
'32"
: ^»
'10"
Long
116
116
116
116
116
116
116
116
itude
56
56
53
48
41
47
41
27
'30"
'1C"
'34"
'42"
'30"
34"
'30"
09"
Elev. Observed gravity
2290
2430
2235
2275
2320
2440
2525
2547
1303.
1291.
1308.
1302.
1295.
1291.
1275.
1270.
4
6
7
7
6
1
3
5
32-0 4332&S" JWI?" 1317 I**?*
32-
\ ' *
32-
i
> *
^J
32-4
32-
v?~~? «-
32-
32-
-> ^-~
" O-V -
32-
32-
32-
'" *?
*7 '}
j -L "
32-
1>
u
7
3
9
10
T 10. i.
12
I }
14
15
16
17
43
4,
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
33
34
34
33
v o
32
31
30
28
27
26
25
24
26
26
27
28
'35*5"
33.5"
'57"
'36"
'A3. 5"
5 43"
"52"
33"
1 54.5"
'47"
12"
03"
'11.5"
'37.5"
33"
'36"
30.5"
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
48
50
52
51
49
52
51
51
51
51
51
51
52
46
48
45
46
'40"
2G"
'13"
04"
l rou~) -
'13 !l
'02"
'li"
30"
1 C M 1
'00"
t T_2'i
'17"
'51"
33"
'59"
58"
2246
2259
2251
2300
2298
2321
2337
2394
2665
2743
3065
3691
3717
2384
2581
2278
2433
1257.
1257.
1253.
1254.
1251.
1251.
1246.
1242.
1224.
1221.
1194.
1151.
1144.
1238.
1229.
1245.
8
3
4
5
6
7
3
9
3
0
6 .
5
4
4
0
2
1232.1
Bouguer g.
-90.2
-97.8
-95.9
-95.7
-99.4
-93.4
-93.7
-31.5
-A^/ 7
-107.0
-107.6
-108.1
-107.0
-108.7
-107.2
-110.3
-108.4
-108.2
-105.1
-109.9
-113.7
-117.9
-107.6
-105.2
-108.6
-113.5
faoo)
J :. - - ion
32-18
::2-i9
32-20
32-21
3j-0
" 0 T-i ->- i
33-2
33-3
33-4
33-6
33-7
3-3-8
33-9
33-10» 53-11
33-12
33-13
33-14
TO T r _i ~>~ LJ
33-16
33-17
^ -i .-»~> -J - 1 0
33-19
33-20
33-21
33-22
Latitude
43
43
43
43
42
43
43
43
43
43
43
43
43
43
43
43
43
43
43
/ "3Lr ~i
i -i -r->
43
43
43
43
43
29
30
31
31
59
00
01
01
02
03
04
05
05
05
06
07
07
07
06
06
05
05
C4
04
03
02
i r> i ii
'09.5"
00"
'52.5"
I 0 '-' ' i
'13.5"
37.5"
'42.5"
'10.5"
'05.5"
24.5"
08.5"
30.5"
43.5"
34.5"
30"
59.5"
'04"
05"
33"
» 01 TI
'24"
'34"
11.5"
03"
'28.5"
Longitude
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
47
48
49
43
05
04
04
03
01
01
01
01
02
03
03
03
04
C4
04
06
07
06
05
04
04
03
39"
'31"
4911
13311
32"
lorn-> .*>
"IS" "
'20"
44"
'10"
04"
48"
'36"
43"
'28"
'02"
' ^911
1 29 "
'46"
i o r 1 1 .jo
i 22"
'19"
42"
'02"
'05"
24"
Elev. Observed gravity
2348
2543
2397
2312
2367
2418
2521
2770
2838
2894
2956
2968
2972
2943
2998
3061
3046
3023
2932
2927
2833
2898
2918
2916
2366
2835
1241
1228
1238
1249
1202
1204
1204
1189
1185
1192
1197
1199
1202
1206
1208
1201
1204
1205
1206
1204
1203
1203
1199
1198
1192
1192
.2
.9
.5
.1
.4
.5
.9
.1
.5
.1
.0
.7
.4
.1
.3
.3
.0
.3
.6
.8
.0
.1
.9
.9
.7
.0
Bougucr
-111
-112
-113
T*i09
-103
-99.
-95.
-96.
-93.
-87.
-31.
-79.
-76.
-75.
-70.
-75.
-74.
-72.
-75.
-73.
-31.
on-oU .
on oU .
-81.
-89.
-90.
g-
.2
.8
.3
'.-0
.8
8
3
2
5
9
2
0
6
1
1
3
3
7
6
4
1
2
9
5
1
7
(JOO)
.Sll: ': ." ion
23-23
33-24
33-25
33-26
3_>- ~7
5>23
33-29
33-30
33-31
33-32
3>3|
33-34t
33-35
33-4
33-3$
33-38
33-39
33-40
33-41
33-43
33-44
33-45
33-46
33-4?
33-43
33-49
Latitude Longitude
43
43
43
43
43
43
43
43
- 42
42
/, 2
42
42
42
42
42
42
42
42
42
'T
42
42
42
42
43
00
00
CO
00
01
C2
03
01
58
57
r c
54
53
54
55
56
56
55
55
55
55
56
57
57
58
02
"58.5"
09.5"
'44.5"
'44"
36"
'23"
' 21"
'36.5"
18"
16"
1 '. r M
20"
'00M
'07.5"
1 13"
'22.5"
'22.5"
41"
>24"
'36.5"
05"
'53"
'11"
"37"
05.5"
27"
116
116
116.
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
115
115
115
116
116
116
116
116
02
02
05
06
06
06
07
05
04
04
04
04
04
02
02
03
02
00
53
56
57
00
01
02
03
OS
'12"
'35"
'47"
"48"
"58"
'53"
1 12"
47"
'35"
34"
i ', .-, 1 1~l'4
33"
'43"
04"
'47"
' 23"
11"
OS"
'37"
1 A 0 1 1 TV-'
'15"
24"
24"
26"
21"
46"
Elev. Observed gravity
2798
2517
2404
2362
2396
2438
- 2582
2429
2450
2497
2579
2635
2724
2642
2553
2571
2509
2527
2531
2593
2490
2377
2400
2402
2399
2387
1182.
1195.
1208.
1209.
1212.
1215.
1211.
1211.
1188.
1179.
1165.
1156.
1149.
1157.
1165.
1168.
1171.
1168.
1167.
1169.
1177.
1185.
1184.
1186.
1190.
1
4
1
8
7
0
2
0
9
2
3
1
6
S
2
3
7
3
8
o
6
4
7 .
4
6
1215.6
Bouguer g.
-100.
-102.
-97.8
-98.6
-95.0
-91.4
-88.0
-94.7
-110.
-115.
-12?± it* *. »
-126.
-125.
-123.
-123.
-121.
-121.
-122.
-122.
-117.
-116.
-116.
-116.
-115.
-111.
5
8
6
9
6
4
5
9
5
0
3
6
4
9
1
3
1
0
7
-93.8
(a oo)
ot^icn
33-50
32-51
33-52
33-53
33-54
33-50
33-57
33-53
33-60
33-61
33-62
33-63
33-64
33-65
33-66
33-67
33-63
33-69
33-70
33-71
33-72
33-73
33-74
33-75
33-76
33-77
Latitude
43
43
43
43
43
43
43
43
43
43
43
43
42
42
42
42
42
42
42
42
42
42
42
42
42
42
04
03
04
05
OS
06
06
07
09
10
09
04
57
56
55
57
56
58
57
59
58
53
57
56
56
55
'11"
'36"
'47"
'52.5"
'59.5"
1 55.5"
'45"
'06"
'21.5"
'13.5"
'50.5"
11"
'07"
16"
! 26"
04.5"
'46"
'05"
57 ,i
'50.5"
'28"
24"
'36"
57"
'09"
'21.5"
Longitude
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
03
09
09
09
09
11
12
13
15
16
17
06
05
06
06
07
08
07
05
05
09
11
12
12
12
13
'10"
'13"
'42"
49"
'16"
1 22"
'15"
'22"
'14"
'26"
'53"
'53"
43"
30"
'04"
15"
'56"
'00"
39"
'20"
'48"
'10"
'OS"
32"
'55"
! 27"
Elev. Observed gravity
2855
2811
2847
2328
2369
2903
2399
2908
2990
2936
2337
2950
2602
2572
2594
2594
2872
2492
2581
2367
2560
2746
2856
2917
3022
3171
1195.
1191.
1197.
1204.
1209.
1202.
1200.
1199.
1204.
1206.
1207.
1190.
1172.
1168.
1162.
1171.
1149.
1185.
1178.
1204.
1179.
1163.
1151.
1143.
1132.
2
2
0
7
0
1
0
4
0
9
1
6
6
3
1
9
5
0
4
9 '
3
5
4
6
5
1119.1
Bouguer g
-83 . S
-94.6
-88.3
-83.5
-73.4
-83.1
-85.3
-85. 8
-79.7
-81.3
-86.5
-87.7
-116.
-120.
-124.
-117.
-122.
-111.
-112.
-101.
-113.
-118.
-122.
-125.
-129.
. -132
0
9
4
1
4
6
7
9
8
4
7
8
4
.7
(zoo)
. -:;t
O " ~- -I /
V3 -*? J-> 1
r\ »-. -,-}_* O
~ -J \J
-J .^ O
-rfO~ O
1 « /- _>_/ «_(
" O ">j3-o
ion
<-N w
9
0
1
2
J
/.'T
_>
O O i/ /"J_>-c»(J
O '1 n -l_»" 0
j! _> u
3b-3
7
\.t
*}
33-90
33-91
1-'-n ?-!-' -'
', " O _»_»->
2
3
" i n /jj-94
33-9 5
33-96
o 'j r> 7 j->-y /
J -> V' o
'. r; r -;->- i >'
33-100
3/.-0
34-1
*} /, O-» -'- ji
Latitude
42
42
42
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
43
42
42
42
54
53
59
po
01
02
02
04
02
02
04
06
07
07
05
04
03
03
01
01
00
02
00
52
53
54
'29"
'51.5"
'43"
"43.5"
'35".
'26.5"
'51. 5"
'03"
'40"
42"
'28"
'14.5"
'05.5"
'10.5"
'56.5"
59"
'53"
13"
'23.5"
'03.5"
32.5"
'10"
'24.5"
'51"
'34"
'46.5"
Longitude
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
116
115
115
115
13
14
09
09
10
11
13
12
14
16
17
17
17
IS
18
20
22
23
23
21
19
19
13
47
46
45
39"
10".
'25"
18"
'07"
'42"
'03"
'37"
'36"
'36"
'30"
13"
'47"
'49"
'37"
'CO 11
'17"
43"
'33"
'22"
10711
'01"
'33"
'43"
30"
"09"
Elev. Observed gravity
3272
3335
2457
2380
2377
2357
2387
2376
2440
2572
2456
2392
2327
2352
2511
2636
2795
2328
2799
2725
2639
2556
2591
2551
2972 .
2579
1111.
1107.
1193.
1204.
1207.
1209.
1207.
1215.
1196.
1182.
1199.
1216.
1223.
1218.
1203.
1180.
1160.
1154.
1150.
1155.
1163.
1174.
1179.
1168.
1142.
5
4
4
6
3
5
4
6
4
7
8
4
4
3
0
5
5
4
8 .
6 '
9
7
5 -
5
9
1183.3
Bouguer g.
-133.0
-132.3
-107.8
-102.7
-101.5
-101.8
-102.7
-96.9
-110.2
-116.1
-10S.6
-98.5
-96.7
-100.3
-104.3
-114.8
-126.7
-129.9
-132.4
-131.6
-127.6
-124.2
-114.7
-116.8
-118.2
-103.2
(aoo) R^ff7LJ) . 5* / 1
Station
54-4
34-6
34-7
54-9
« / - ,-,
54- il
: A_ - O
34-13
34-14
34-15
4.4- i'j
&-I7
' 34-18 .
|4-19
|4-20
34-21-
34-22
34-23 " .
34-24
54-25
55-0
35-1
35-2
35-3
35-4
35-5
Latitude Longitude
42 54 '34"
42 56 '27"
42 55 '12"
42 51 '46"
42 49 '45"
42 43'23"
42 45 '27"
42 44' 33"
42 42'56"
42 41'17"
42 3C'07"
42 36'23"
42 34 '30"
42 33 '01"
42- 31 '27"
42 22 '54"
42 14 '52"
42 12'33"
41 50 '05"
42 55 '54. 5"
42 56'45.5".
42 58 '28"
42 59 '24"
42 59 '22. 5"
115 43 '00"
115 47 '09"
115 46 '43"
115 51'48"
115 53'2i"
115 54 '28"
115 54 '41"
115 .53' 54"
115 54 '04"
115 54 '12"
115 54 '1.0"
115 54 '30"
115 53' 54"
115 53'43"
115 54 '05"
115 53 '00"
--
116 01 '24"
116 06'36"
115 57'46"
--
115 45'46"
115 45'il"
115 45'35U
115 45'45"
115 44 '08"
Elev. Observed gravity
2526
2509
2672
2536 '
2605
2561
2842
3057
3376
3520
413G
4539
4717
4753
4984
5070
--
5730
5410
5541
--
2485
2471
2672
3004
3022
1188.4
1194.2
1175.2
1159.8
1158.1
1157.3
1143.8
1124.8
1096.2
1080.0
1023.7
991.7
977.3
970.1
952.5
928.9
867.7
876.2
890.3
823.2 .
1196.0
1194.5
1202.7
1200.9
1184.1
1187.1
Bougucr g.
-101.0
-99.0
-106.3
-124.7
-119.3
-114.7
-114.4
-117.7
-124.6
-129.7
-141.3
-149.6
-150.5
-153.3
-154.7
-160.3
-161.4
-163.1
-18S.7
--
-99.3
. -93.2
-85.5
-83.8
-79.7
(AOO) RjftrrZ-0. S J I
SI. '--ion
35-6
i r, -°
-> " s
35-10
35-11
35-12
35-13
35-14
35-15
35-16
35-17
36-Q
36-2
36-3
36-4
36-5
36-6
36-7
36-8
36-9
36-10
36-11
36-12
Jo- 1 J
36-14
36-15
Latitude
42 59 '22"
42 59 '07. 5"
42 58 I 03"
42 53 '49"
42 5S'C4.511
42 56 '53"
42 57'29.5"
42 57 '54"
42 55'55"
42 55'26.5"
42 55 '26"
42 57'30.5"
42 55'33.5"
42 54 '26"
42 53'31.5"
42 52'46"
42 51 '53"
42 51 '03"
42 50 '14'. 5"
42 49 '36"
42 43'22"
42 47'19.5"
42 46'32"
42 47 '10"
42 43'53.5"
42 49 '47. 5"
Longitude
115 41 '45"
115 40'34"
115 39'13"
115 38 ! 00"
115 40'35"
115 41 '09"
115 42 '34"
115 44 '30"
115 44 '50"
115 43 '02"
115 41'17"
115 16'53"
115 33'30"
115 33 '31"
115 33 '29"
115 32'42"
115 31 '43"
115 31'05"
115 30'18"
115 29 '20"
115 23 '33"
115 29 '38"
115 29 '45"
115 26 '46"
115 26'56"
115 26 '54"
Elev.
3036 '
3040
2867
3004
2862
2810
2787
2713
2483
2482
2482
2542
2505
2592
2625
2728
2900
2816
2865
2929
3003
3278
3426
2939
2876
2859
Observed gravity
1185.4
1183.2
1191.1
1182.8
1188.8
1187.3
1190.5
1195.9
1196.6
1197.0
1200.5
1199.8
1208.1
1197.0
1190.2
1179.0
1162.5
1165.3
1155.7
1147.8 .
1138.7
1117.8
1104.5
1139.3
1149.9
1155.6
Bcuguer g.
-80.5
-82.2
-83.0
-84.3
-85.6
-83.6
-87.5
-87.0
-97.4
-96.3
-92.7
-93.1
-84.1
-83.2
-91.6
-95.5
-100.4
-101.5
-106.8
-109.9
-112.4
-115.5
-118.7
-114.2
-109.9
-106.6
(AOO) Ralcr<rhO. & 1 1
- : - ' " : "
1< j--!-;
3G-/-5
J w-^U
"» / A 7wv-"v I
j * /. X O "" ' 1 V.'
r* r 1 J _»--;-:>
y,-x
~> o i
3v>~52
36-53
2 o-54
25-55
36-56
36-57
36-58
36-59
^ '" f r\ jc-oU
36-61 -
36-62
36-63
36-64
36-66
36-67
36-68
36-69
_ v « 'j
Lr.tltude
42 52 '53"
42 52 '06. 5"
42 50 '51. 5"
42 51'05.5"
42 43'07.5"
42 45 I 52;5"
42 45 '23. 5"
42 46 '30. 5"
42 46 '19. 5"
42 45'57.5"
42 45'H"
42 45'00.5"
42 45 '05"
42 45 '40"
42 46 '13. 5"
42 47 '30. 5"
42 50'35.5"
42 51'33"
42 52 1 46"
42 53 I 02.5"
42 5S I 56"
42 5S'55.5"
42 58 '04. 5"
42 57' 11"
42 58'00.5"
42 59 '23"
Longitude Elev. Observed gravity
115 26 '46"
115 26'33"
115 25'05"
115 26 '46"
115 26'40"
115 28 I 00"
115 27' 00"
115 24 '53"
115 24 '01"
115 23'01"
115 22'40"
115 21' 23"
115 20 '18"
115 19'37"
115 20'47"
115 21 '15"
115 23'53"
115 24 '16"
115 22'36"
115 32'46"
115 34'21"
115 35'52"
115 37 '01"
115 35'52"
115 35'03"
115 32'51"
2893
2891
2839
2853
2885
3219
3258 '
3083
3089
3031
3098
3173
3162
2997
3154
3186
2854
3126
3140
2859
3006
3023
2933
2389
2862
2976
1175.8
1170.8
1164.4
1165.4
1148.1
1114.9
1110.8
1127.9
1127.8
1126.6
1121.0
1115.4
1115.4
1127.9
1120.5
1121.6
1159.4
1147.8
1152.7
1191.8
1182.1
1179.8;
1188.2
1189.3 .
1194.0
1185". 2
Bougucr g.
-88.9
-93,0
-100.6
-99.0
-110.0
-119.3
-120.8
-115.9
-115.4
-116.5
-119.9
-120.7
-121.5
-119.8
-118.6
-117.5
-104.3
-101.0
-97.1
-82.8
-85.0
-86.2
-81.9
-82.2
-80.3
-84.4
00)
£ t a '.: ion
26-16
36-17
1 .C > <"> ^ yy AW
36-19
36-20
36-21
36-22
36-23
36-24
36-25
36«2G
36-29
36-30
36-31
36-32
36-33
36-34
36-35
36-36
36-37
35-33
36-39
36-40
36-41
36-42
36-43
Latitude
42 50'30.5"
42 57' 03"
42 51 f 30.5"
42 52 '02"
42 52'01.5"
42 52'56"
42 53 '39"
42 56 '18"
42 55 '25. 5"
42 55'25.5"
42 55 '24. 5"
42 53 '03. 5"
42 51 '04"
42 50 '00. 5"
42 47 '27"
42 46*16. 5"
42 45'01.5"
42 46 '24. 5"
42 46'21"
42 45'52.5"
42 45'54.5"
42 56 '18"
42 53 '59. 5"
42 55'09.5"
42 53 '44. 5"
42 52'55"
Longitude
115 26'57"
115 27 '40"
115 28 '39"
115 29 '46"
115 30'35"
115 31'55"
115 32'33"
115 30 '54"
115 34 '58"
115 36'26"
115 38'35"
115 34 '02"
115 33 '07"
115 33 '05"
115 33 '11"
115 34 '38"
115 35'36"
115 33 '20"
115 32'25"
115 31 t 36"
115 30'22"
115 21'03"
115 22 '34"
115 26 '52"
115 26 '22"
115 24 '37"
Elev. Observed gravity
2838
2934
3041
3104
3093
2731
2647 '
2491
2485
2505
2709
2552
2834
2929
3366
3554
3542
3576
3534
3492
3504
2560
3122
2886
3110
3136
1162.4
1158.1
1154.6
1153.2
1152.1
1181.1
1189.9
1211.7
1208.3
1205.0
1188.3
1191.9
1159.8
1147.3
1111.0
1092.8
1090.9
1094.5
1097.8
1098.7 -
1097.5
1203.6
1159.5
1182.6
1161.4
1155.5
Bouguer g.
-102.1
-100.9
-99.3
-97.7
-99.4
-93.5
-90.8
-82.3
-84.7
-86.9
-91.3
-93.6
-105.7
-111.0
-117.2
-122.4
-123.2
-119.6
-118.7
-119.6
-120.2
-86.3
-93.2
-86.0
-91.7
-94.7
KA^crsn*. ff '//
Station
36-93
36-99
36-100
36-131
36-102
36-103
36-104
36-105
36-106
36-107
36-103
36-109
37-0
37-1
37-2
37-3
37-4
37-5
37-6
37-7
37-9
37-10
37-11
37-12
37-13
37-14
Latitude Longitude
42 43 '52"
42 46 '53. 5"
42 46 '04. 5"
42 45' 10"
42 45 '42"
42 47 '29. 5"
42 40 '41"
42 51' 18"
42 51 '32"
42 52 '15"
. 42 53 ! 41"
42 57'35"
42 54 ! 38.5"
42 53 '43"
42 53 ! 22"
42 53 '15"
42 54 '19. 5"
42 52'48.5"
42 53 ! 38"
42 52'36"
42 53 '56"
42 54 '59. 5"
42 56 I 01.5"
42 56'19"
42 56'37"
42 56'22"
115 18 '00"
115 17 '53"
115 17 ! 53"
115 18 '03"
115 15 '28"
115 16 '02"
115 16 '40"
115 17 '35"
115 16 '08"
115 IS'25"
115 15'4?"
115 15 '50"
115 55'40"
115 53 '56"
115 55'24"
115 56'38"
115 58 '04"
115 57' 22"
115 51'46"
115 50'29"
115 49 '24"
115 49 '34"
115 50 '47"
115 52'02"
115 53 '15"
115 55'02"
Elev. Observed gravity
3177
3191
3153
3225
3318
3201
3140
3012
3127
3012
2676
2601
2622
2620
2715
2652
2606
2716
2524
2580
2509
2599
2674
2658
2641
2658
1122.6
1116.7
1116.7
1109,9
1105.9
1118.0
1125.6
1146.0
1138.6
1152.4
1185.4
1193.4
1164.4
1159.7
1151.3
1153.5
1159.3
1149.1
1169.0
1162.9 .
1177.3
1176.3
1175.6
1176.9
1178.5
1170.4
Bouguer g.
-119.2
-121.2
-122.2
-123.4
-122.6-
-120.2
-118.0
-109.2
-110.1
-104.3
-93.6
-95.9
-119.3
-122.7
-124.9
-126.3
-124.9
-126.2
-119.1
-120.2
-112.1
-109.2
-107.0
-107.2
-107.0
-113.7
