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GEOIXXJICAL SURVEY CIRCULAR 325
STRATIGRAPHIC SECTIONS
OF THE PHOSPHORIA
FORMATION IN WYOMING
1952
This report concerns work done on behalf of the U. S. Atomic Energy Commission and is published with the permission of the Commission.
UNITED STATES DEPARTMENT OF THE INTERIOR Douglas McKay, Secretary
GEOLOGICAL SURVEY W. E. Wrather, Director
GEOLOGICAL SURVEY CIRCULAR 325
STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN WYOMING
1952
By R. P. Sheldon, E. R. Cressman, L. D. Carswell, and R. A. Smart
This report concerns work done on behalf of the U. S. Atomic Energy Commission and is published with the permission of the Commission.
Washington, D. C., 1964
Fr«e on application to the Geological Surrey, Washington 26, D. C.
STRATIGRAPHIC SECTIONS OF THE PHOSPHORJA FORMATION IN WYOMING
1952
By R. P. Sheldon, E. R. Cressman, L. D. CarswelL, and R. A. Smart
Introduction....................Acknowledgments...............Stratigraphy of the Phosphoria
formation in western Wyoming.Stratigraphic sections...........References.....................Tables of Stratigraphic
sectionsMiddle Piney Lakes.......
CONTENTS
Lot no. Page
11
144
1377
Lot no. Page
Tables of Stratigraphic sections Continued
Deadline Ridga................. 1380 8Fontenelle Creek............... 1379 11Basin Creek.................. . 1381 15West Branch of
Hams Fork Creek............. 1383 19Wheat Creek.................... 1378 20SouthMountain pit and mine...... 1382 23
ILLUSTRATIONS
Figure 1. Outcrops of the Phosphoria formation in Wyoming and localities sampled.................2. Generalized section of the Phosphoria formation at Coal Canyon, Wyoming [lot no. 1201].
Page
23
INTRODUCTION
The U. S. Geological Survey has measured and sampled the Phosphoria formation of Permian age at many localities in Wyoming and adjacent states. The data will not be fully synthesized for many years, but segments of the data, accompanied by little or no in terpretation, are published as preliminary reports as they are assembled. This report, which contains ab stracts of the sections measured in western Wyoming (fig. 1) during 1952, is the fourth Wyoming report of this series. The field and laboratory procedures adopted in these investigations are described in a previous report (McKelvey and others, 1953a).
Many people have taken part in this investigation. T. M. Cheney participated in the description of strata and the collection of samples referred to in this report and T. K. Rigby assisted in the collection of samples. The laboratory preparation of samples for chemical analysis was done in Denver, Colo., under the direc tion of L. F. Rader. The chemical analyses were made for the Survey by the U. S. Bureau of Mines at the Northwest Electrodevelopment Laboratory, Albany, Oreg., under the direction of S. M. Shelton and M. L. Wright.
K. S. Bergman compiled most of the data and Anita Wise organized the tabular data.
ACKNOWLEDGMENTS
Special thanks are due J. D. Love, W. W. Rubey, and J. Steele Williams, who contributed much in the way of advice and suggestions in planning and organi zation of the field program; The cost of both the field and laboratory investigations has been borne partly by the Division of Raw Materials of the Atomic Energy Commission. It is a pleasure to acknowledge the fine cooperation extended to the field parties by the local residents, property owners, and phosphate companies, who furnished information and services and gave access to property.
STRATIGRAPHY OF THE PHOSPHORIA FORMATION IN WESTERN WYOMING
In northwestern Wyoming the Phosphoria for mation is about 200 feet thick and has been divided into five members. These members have been ten tatively correlated with the five members in Montana that are designated the _Aj B, C^ D, and Ej from oldest to youngest (Klepper and others in McKelvey, 1949). Member A, overlies the Tensleep sandstone of Pennsylvanian age and consists of cherty carbonate and detrital rocks; it may be equivalent to the upper part of the Wells formation in Idaho. Members B_, C. and D, composed respectively of phosphatic, cherty,
Outcrop of Phosphoria formation, dotted where questionable
Location and lot number of sample locality included in this report
Location and lot number of sample locality Jncluded in other reports
Compiled and mottled from Love and often. 1952
40 Miles
Figure 1. Outcrops of the Phosphoria formation in Wyoming and localities sampled.
PERCENT RjOg
3O 20 10
THICK-
IN FEET PERCENT
48
67
13
14
15
10
29
21
11
18
13
Trac«
23
19
28
23
16
Diowoody formationMudstone
'Phosphoria formation, Upper shale member
Phosphate rock: pisolitic, medium-hard, grayish-brown, thick-bedded, -hert at base
Mudstone: hard, grayish-brown and brownish-black, thin- and thick-bedded; some medium -hard interbedded dolomite
Phosphate rock: oolitic and non-oolitic, hard, black, thin- and thick-bedded; chert and mud stone interbeds "
Rex chert member
Chert and limestone: hard, black, duck-bedded chert; hard, brownish-gray, thick- bedded limestone represents about 10 percent of unit
CoveredPhosphatic shale member
Dolomite: hard, brownishrgray and black, thick-bedded; mudstoae and phosphate rock interbeds
Phosphate rock: oolitic, medium-hard, dark-gray and brownish-black, fissile to thick-bedded; soft limestone and mjudstone interbeds
Limestone: hard, gray, thick-bedded; mudstone and phosphate-rock interbedsMudstone: hard, black, fissile to thick-bedded. "Vanadiferous zone,* 0.68 percent
average V2O; content
Dolomite, mndstone, and limestone: interbedded, srgillaceous hard, brownish- black 'dolomite, phosphatic soft to medium-hard, black mudstone, and argillaceous hard, brownish-black limestone
Phosphate rock: coarse-grained, oolitic, soft, black, thin-beddedDolomite: soft, black, thick-bedded; phosphate rock interbedded near top
Phosphate rock: medium coarse-grained, oolitic, soft, black, dun-beddedMudstone and dolomite: iaterbedded soft, black, thin-bedded mudstone andmedtum-
hsrd, brownish-black, thia-bedded dolomite; some finely oolitic, black, phos phate rock
Phosphate rock: oolitic, soft to mediumrhard, black, fissile to dun-beddedDolomite: soft to hard, brownish-black to black, thin- to thick-beddedPhosphate rock: oolitic, soft to medium-hard, black, fissile to thin-bedded;
dolomite and mudstone interbeds.Mudstone; medium-hard, brownish-blsck to blsck, fissile to thin-bedded; phos
phate rock at base
Wells formationLimestone
Figure 2. Generalized section of the Phosphoria formation at Coal Canyon, Wyoming (lot no. 1201).
and phosphatic rocks, are equivalent to the phosphatic shale member, the Rex chert member, and the upper shale member of the Phosphoria formation in Idaho and southwestern Wyoming (Sheldon in Swanson and others, 1953). Member E_, not yet recognized in southeastern Idaho, consists of chert, sandstone, and carbonate rock and is overlain by the Dinwoody for mation of Triassic age.
In southwestern Wyoming the Phosphoria. for mation consists of 3 members: a lower phosphatic shale member, 95-145 feet in thickness; the medial Rex chert member, cherty limestone, 65-145 feet in thickness; and the upper shale member, 15-60 feet in thickness (fig. 2). It overlies the Wells formation of Pennsylvanian age and underlies the Dinwoody for mation of Triassic age. Although the Wells formation consists largely of quartzose sandstone, calcareous in part; the upper 25 feet or more is dark-gray limestone and is equivalent to the upper member of the Wells for mation in Idaho and may be the correlative of the lower most member (A_ member) of the Phosphoria formation in northwestern Wyoming and Montana and, according to McKelvey, the lower limestone member of the Park City formation in Utah. The Dinwoody formation consists of limestone, calcareous siltstone, and sandstone.
The correlation of individual beds of the phos phatic shale members with those in adjacent parts of Idaho, Montana, and Utah will be discussed in greater detail in a later publication. The phosphatic shale member in southwestern Wyoming and its correlative, the B_ member, in northwestern Wyoming contain most of th"e phosphate-bearing layers. The upper shale member and its correlative, the D_ member, contain only thin layers of phosphatic chert and phosphatic layers of local significance.
STRATIGRAPHIC SECTIONS
Analytical data and abstracts of stratigraphic sections measured at seven localities follow. Their locations, as well as the locations of those reported previously (McKelvey and others, 1953b, Sheldon and others, 1953, Cheney and others, 1953) and of others to be reported later, are shown in figure 1.
REFERENCES
Cheney, T. M., Sheldon, R. P., Waring, R. G., and Warner, M. A., 1953, Stratigraphic sections of the Phosphoria formation in Wyoming, 1951: U. S. Geol. Survey Circ. 324.
Love, J. D., Weitz, J. L., and Hose, R. K.,1952. Geologic map of Wyoming: U. S. Geol.Survey.
McKelvey, V. E., 1949, Geological studies of thewestern phosphate field: Am. Inst. Min. Met.Eng. Mining Trans., v. 184, p. 270-279.
McKelvey, V. E., Davidspn, D. F., O'Malley, F. W.,and Smith, L. E., 1953a, Stratigraphic sections ofthe Phosphoria formation in Idaho, part 1: U. S.Geol. Survey Circ. 208.
McKelvey, V. E., Smith, L. E., Hoppin, R. A., andArmstrong, F. C., 1953b, Stratigraphic sectionsof the Phosphoria formation in Wyoming, 1947-48:U. S. Geol. Survey Circ. 210.
Sheldon, R. P., Waring, R. G., Warner, M. A., andSmart, R. A., 1953, Stratigraphic sections of thePhosphoria formation in Wyoming, 1949-50: U. S.Geol. Survey Circ. 307.
Swanson, R. W., McKelvey, V. E., and Sheldon, R. P.,1953. Progress report of investigations of northwest phosphate deposits: U. S. Geol. Survey Circ. 297.
Mid
dle
Pin
ey L
akes
, W
yo.,
lot
1377
Phosp
hori
a fo
rmat
ion
mea
sure
d a
nd p
hosp
hat
ic p
ort
ion
s sa
mple
d f
rom
han
d tr
ench
es a
nd n
atu
ral
exposu
re o
n n
ort
h s
ide
of M
iddl
e P
iney
C
reek
, j
mil
e nort
hea
st o
f M
iddl
e P
iney
Lak
e,
NE
^NW
i se
c.
8, T
. 30
N.,
R.
115
W.,
Suble
tte
Cou
nty,
W
yo.
Bed
s st
rike N
. 20
" W
. an
d di
p 10
* E
. S
ecti
on m
easu
red
by
R= P
. S
held
on,
L.
D.
Car
swel
l,
and
E.
R.
Cre
ssm
an a
nd s
ample
d b
y S
held
on a
nd
Car
swel
l in
May
and
June
1952
. S
ample
s an
alyze
d b
y U
. S.
Bure
au o
f M
ines
lab
ora
tory
, A
lban
y,
Ore
g,
Bed
no
.R
ock
des
crip
tion
Sam
ple
no.
Thic
knes
s (f
eet)
Chem
ical
anal
yse
s (p
erce
nt)
P2°5
Aci
d in
solu
ble
Cu
mu
lati
ve
thic
knes
s (f
eet)
Th
ick
nes
s x
per
cen
t P
2Oc
(cum
ula
tive/
Din
woo
dy f
orm
atio
n b
asal
be
d on
ly
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over
ed i
nte
rval
; co
uld
be e
ither
D
inw
oody
or
E (
?) m
ember
or
8.0
8.5
8.0
16.5
E (
?) m
emb
er o
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ho
sph
ori
a fo
rmati
on t
op n
ot e
xpose
d
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her
t
10.5
10.5
Upper
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ember
of
Ph
osp
ho
ria
form
atio
n
U-1
2 01
U
-ll
u-io
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9 U
- 8
U-
7 U
- 6
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5 U
- 4
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3
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2 U
- 1
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ston
e,
cher
ty ---
- - - - -
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_ __
_
____
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dst
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70
36
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S
2.4
.5
3.9
3.0
2,7
5.4
1.1
3.8
1.2
1.0
8.0
1.5
29.7
»
12.5
2.4
2.9
6.8
9.8
12.5
17.9
19.0
2
2.8
24.0
25.0
33.0
3
4.5
Rex
ch
ert
mem
ber
of
Phosp
hori
a fo
rmat
ion
R-3
2
R-3
1 R
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9
R-2
8
R-2
7
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6
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5
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Car
bonat
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ck a
nd
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- -
-
----
70
35
-RP
S2.0
4.0
4
.5
5.0
12.0
6.0
6.0
10.0
6.9
8.2
2.0
6.0
10.5
15.5
2
7.5
33.5
39.5
49.5
Mid
dle
Pin
ey L
ak
es
Co
nti
nu
ed
Bed
no
.
R-2
4
R-2
3 R
-22
R-2
1 R
-20
R-1
9
R-1
8
R-1
7
R-1
6
R-1
5
R-1
4
R-1
3
R-1
2
R-l
l R
-10
R-
9 R
- 8
R-
7 R
- 6
R-
5
R-
4 R
- 3
R-
2 R
- 1
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k des
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tion
f Q
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atic
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Ch
ert
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Sam
ple
no.
--
Thic
knes
s (f
eet)
8.0
2.0
12.0
7.0
1.5
15.5
5.8
8.5
6
.5
4.8 .3
2.4
.8
3.5
2
.5
2.7
1
.0
1.7
2
.7
.8 . 1
.7
2.7
.3
Chem
ical
an
aly
ses
(per
cen
t)
P2
°5
M
Aci
d in
solu
ble
Cu
mu
lati
ve
thic
kn
ess
(fee
t)
57
.5
59
.5
71.5
78.5
80.0
95
.5
101.3
109.8
116.3
12
1. 1
121.4
123.8
124.6
12
8.1
130.6
133.3
13
4.3
136.0
138.7
139.5
139.6
14
0.3
143.0
143.3
Th
ick
nes
s x
per
cent
Po
^s
(cum
ula
tive)
_-
Phosp
hat
ic s
hal
e m
emb
er o
f P
hosp
hori
a fo
rmat
ion
P-3
5
P-3
4
P-3
3
P-3
2
P-3
1
P-3
0
P-2
9
P-2
8
P-2
7
P-2
6
Ch
ert
-- _
____
_C
arbonat
e ro
ck -
----
----
----
----
----
----
Phosp
hat
e ro
ck a
nd p
hosp
hat
ic,
calc
areo
us
cher
t --
----
----
----
--- -
_-_
_ _
____
__M
udst
one
----
----
----
----
----
----
----
--P
hosp
hat
e ro
ck -
--- _
____
____
____
_ _
__
Mud
ston
e - ---
--- _
___ .
Phosp
hat
e ro
ck,
argil
lace
ous
Mud
ston
e - -
Car
bo
nat
e ro
ck,
argil
lace
ous'
M
udst
one
- _
_ ---
- _
_--
.
7034-R
PS
7033-R
PS
7032-R
PS
7031-R
PS
7030-R
PS
7029-R
PS
7028-R
PS
7027-R
PS
7026-R
PS
7025-R
PS
1.7
.3 1.3
4.0 .4 1.5
.4
.9 .4
3
.5
7.2
1
.6
29
.45
.33
1,2
3.1
18.7 .6 .4
2
.3
70.6
7.7
15.6
70.8
10.0
72
.13
1.7
76
.1
20.3
76
.5
1.7
2.0
3.3
7.3
7
.7
9.2
9.6
10.5
10.9
14.4
12.2
412.7
2
50
.94
72.1
48
4.6
2
89.2
79
6.7
59
7.2
9
97.4
5105.5
0
P-2
5
P-2
4
P-2
3
P-2
2
P-2
1
P-2
0
P-1
9
P-1
8
P-1
7
P-1
6
P-1
5
P-1
4
P-1
3
P-1
2
P-l
l
P-1
0
P-
9
P-
8 P
- 7
P-
6
P-
5 P
- 4
P-
3 P
- 2
P-
1
P £
> T
*V
\rtn
O to
Y
*fV
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£> Y
*Cf1
1 1
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rtl1
Q
Mud
ston
e,
carb
on
atic
- -- ---
--- -
Phosp
hat
e ro
ck,
argil
lace
ous,
ca
rbonat
ic
Phosp
hat
e ro
ck,
argil
lace
ous
and
Car
bonat
e ro
ck,
argil
lace
ous
and
Phosp
hat
e ro
ck a
nd p
hosp
hat
ic m
udst
one -
Cher
t,
phosp
hat
ic
--- - - -- -
7024
- R
PS
70
23-
RP
S
7022
- R
PS
70
21 -
RP
S
7020
- R
PS
7019
- R
PS
70
18-L
DC
70
17-L
DC
70
16-L
DC
70
15-L
DC
7014
-LD
C
7013
-LD
C
70 1
2 -R
PS
70
11-
RP
S
70
10
-RP
S
7009
- R
PS
7008
- R
PS
70
07-
RP
S
7006
- R
PS
70
05-
RP
S
7004
- R
PS
70
03-
RP
S
7002
- R
PS
70
01 -
RP
S
7000
- R
PS
3.0
2.0
2.5
2
.5
1.0
2.5
2
.5
1.8
2.0
4.4 .5
.9 1.0 .5
1.5
1.2
3.0
1
.4
4.6
2.7
5.0
.8
.4
1.4
.5
.2
1.2
.3
4.7
4.5
1
.9
1.3
.8
2
.2
8.7
2.6
11.0
1
.6
22
.9
1.5
11.6
25.1
2.0
4
.3
15.1
1
.6
20
.0
34
.4
14.5
23
.2
63
.8
35
.3
35.4
42.2
2
7.3
2
8.8
43.6
77.2
51
.8
22
.9
26
.3
9,0
17.0
20
.4
21
.8
12.6
2
8.7
40.0
28
.6
4.1
25
.1
4.4
44.6
17.4
19.4
21.9
2
4.4
25.4
27.9
3
0.4
32.2
34.2
3
8.6
39.1
4
0.0
41.0
4
1.5
43
.0
44
.2
47
.2
48
.6
53.2
55.9
60.9
6
1.7
62.1
6
3.5
6
4.0
<*0
.40
3.4
0
4.1
5
8.8
5
20
.10
2
4.8
5
27.1
9
28,7
9
38
.47
42.8
2
45.1
6
56
.16
56.9
6
91.3
1
93.1
1
127.
91
163.0
5
172.2
5
183.8
6
259.3
6
260.6
4
268.6
4
31
6.8
0
**324.0
5
Wel
ls f
orm
ati
on u
pper
par
t on
ly
f*w
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r*w
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fw-1
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ioY
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l
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umul
ativ
e dat
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com
plet
e bec
ause
of
mis
sing
inf
orm
atio
n.
Com
puta
tion
s st
art
from
zer
o af
ter
inte
rrup
tion
. **
Not
e in
com
plet
enes
s of
cum
ulat
ive
dat
a.
Dea
dli
ne
Rid
ge,
W
yo.,
lot
1380
Phosp
hori
a fo
rmat
ion m
easu
red
and
phosp
hat
ic p
ort
ion
s sa
mp
led
in
bull
doze
r tr
ench
es o
n w
est
lim
b o
f an
ticl
ine
on D
eadli
ne
Rid
ge,
se
c.
7,
T.
27 N
., R
. 11
4 W
., L
inco
ln C
ount
y,
Wyo
. B
eds
stri
ke
N.
40»
W.
and
dip
45»
SW.
Sec
tion m
easu
red
by
R.
A.
Sm
art,
T
. M
. C
hen
ey,
and
L.
D.
Car
swel
l an
d sa
mp
led
by
Sm
art,
C
arsw
ell,
an
d T
. K
. R
igby
in
July
195
2.
Sam
ple
s an
alyze
d b
y U
. S.
B
ure
au
of M
ines
lab
ora
tory
, A
lban
y,
Ore
g.
Bed
no
.R
ock
des
crip
tio
nS
ampl
e no
.T
hic
knes
s (f
eet)
Chem
ical
an
aly
ses
(per
cent)
P2
°5A
cid
inso
lub
le
Cum
ula
tive
thic
kn
ess
(fee
t)
Thic
knes
s x
per
cen
t P
2Oc
(cum
ula
tive)
Din
woo
dy f
orm
atio
n n
ot m
easu
red
E (
? )
mem
ber
of
Phosp
hori
a fo
rmat
ion
E-
1_
.ert
--20.0
--
20.0
--
Upper
shal
e m
ember
of
Phosp
hori
a fo
rmat
ion
U-2
0 U
-19
U-1
8 U
-17
U-1
6
U-1
5 U
-14
U-1
3 U
-12
U-1
1
U-1
0 U
- 9
U-
8 U
- 7
U-
6
U-
5 U
- 4
U-
3 U
- 2
U-
1
Mud
ston
e,
cher
ty,
carb
onat
ic -
----
----
----
--L
lA
VJO
J^S
Alc
LL
w
JL \J
\*£
±j
\~lt
^&
LJ
T
Cher
t,
carb
on
atic
--
-
---
----
-- ---
-
-L
-.A
wO
^Jll
d L
v?
1 \s
\+i\
. t
lfoL
.1 U
wil
oL
LJH
*
Mud
ston
e,
phosp
hat
ic --
----
----
----
-- -
Cher
t
/"""* V
ioT
't __
iT
fi 1
1 Q f
*f_t
mi c
Cher
t, p
hosp
hat
ic -
-- - ---
Mud
ston
e --
----
-- _
____
____
____
____
_
__
Mud
ston
e,
phosp
hat
ic -
----
----
----
_
____
_"p
Vi f
iQnV
iis to
T*
f"if*
lr Q
T*c
ri 1 1
Q f*
oo
ii Q
-.
-._
.-._
. _.
Phosp
hat
e ro
ck
----
- ---
_
-.___ _
__ _
7218
-TM
C
7217
-TM
C
7216
-TM
C
7215
-TM
C
7214
-TM
C
7213
- R
AS
72
12-
RA
S 72
11 -
RA
S
7210
- R
AS
7209
- R
AS
7208
- R
AS
7207
- R
AS
7206
- R
AS
7205
- R
AS
7204
- R
AS
7203
-RA
S
7202
- R
AS
7201
-R
AS
72
00-
RA
S 71
99-
RA
S
1.0
.7
1
.0
.5
1.2
2.9
1
.2
2. 1
1
.0
.4
2. 1
2.0
3
.8
6.5
3
.1 .5
1.3
1.
1 .9
.5
6.5
11.0
5
.9
13.2
9.5
4.8
4.7
7
.3
14
.7
2.4
2.7
2.4
3.0
2.8
2.4
10.7
2
8.4
10.0
31.7
25.3
60.5
5
7.2
6
3.6
43.4
46.3
60.
1 39.7
57.2
47.6
80.9
77.
1 75.7
7
5.6
69.7
7
6.9
53
.5
16.5
4
7.7
6.7
14.7
1.0
1
.7
2.7
3.2
4
.4
7.3
8.5
10.6
11.6
12.0
14.1
16
.1
19.9
2
6.4
2
9.5
30
.0
31.3
3
2.4
33.3
33.8
6.5
14.2
20
.1
26
.7
38.1
52.0
5
7.7
73.0
8
7.7
8
8.6
94.3
99.1
110.5
128.7
136.2
141.5
178.4
189.4
218.0
230.6
Rex
cher
t m
ember
of
Ph
osp
ho
ria
form
atio
n
R-1
9
R-1
8
R-1
7
R-1
6
R-1
5
Mud
ston
e,
cher
ty
----
----
---
-- -
.--
1. 1
1.3
.4
1.4
2
.6--
1.1
2.4
2
.8
4.2
6
.8--
R-1
4
R-1
3
R-1
2
R-l
l R
-10
R-
9 R
- 8
R-
7
R-
6 R
- 5
R-
4 R
- 3
R-
2 R
- 1
1 *
Vio
¥*$
Q
nri
oV
iot Y
*"i"
v r*
Q T
*Vir
vnQ
to
Y
*rvr
*lr
/""*
Q Y
»l"k /
"vn o
t *3
» T
*rt
olf
_
_
_
_.
_.
1 *
Q T
*Virv
MQ
t o
Y
*rvo
tr
_
_
_ _
Cover
ed i
nte
rval
; ch
ert,
ca
rbonat
e ro
ck,
Cover
ed i
nte
rval
; ca
rbonat
e ro
ck a
nd c
her
t fl
oat
fho-rt
-
--
-
__
__
__
__
__
__
____
__
_
_
_
7198
-TM
C
2.5
1.0
3
.5
2.5
2.5
2.0
3.0
20
0.0
2.0
1.
7 .6
35
.0
2.7
4.7
32
.4
1
»
4.6
9.3
10.3
13.8
16.3
18.8
20.8
23.8
223
08
225.8
2
27
.5
228.
1
263.
1
265.8
2
70
.5
--
Phosp
hat
ic s
hal
e m
ember
of
Phosp
hori
a fo
rmat
ion
P-3
9
P-3
8
P-3
7
P-3
6
P-3
5
P-3
4
P-3
3
P-3
2
P-3
1
P-3
0
P-2
9
P-2
8
P-2
7
P-2
6
P-2
5
P-2
4
P-2
3
P-2
2
P-2
1
P-2
0
P-1
9
P-1
8
P-1
7
P-1
6
P-1
5
P-1
4
Mud
ston
e ---
---
-- ---
-- --
- --
Mud
ston
e - - - -
Mu
dst
one,
ca
rbo
nat
ic - - -
Car
bo
nat
e ro
ck,
arg
illa
ceous-
- - -
Mud
ston
e - ---
-- - _
7197
- R
AS
71
96-
RA
S
7195
- R
AS
7194-L
DC
7193-L
DC
71
92-
LD
C
71
91
-LD
C
7190
- L
DC
71
89-
RA
S
7188
- R
AS
71
87-
RA
S
7186
- R
AS
71
85-
RA
S
7184
- R
AS
7183
- R
AS
71
82-
RA
S
7181
- R
AS
71
80-
RA
S 71
79-
RA
S
7178
- R
AS
71
77-
RA
S
7176
- R
AS
71
75-
RA
S
7174
- R
AS
7173
- R
AS
0.5
.8
1
.3
5.0
.5 .7
. 5 .4
.8
.8 2.0
.4
7.5
1
.1
.6 .8
.5
1.0
.6
.8 1.1
4
.3
.5
.9
1.9 .6
2.0
4.5
2
6.7
6.3
8,1
5.1
7.6
.3
4
.6 1.2
1
0.5
.4
4
.6
1.6 .7
5
.4
3.7
4.8
1.4 1.4
.6
9.1
.9
.7 2.0
78
.3
46.9
2
0.0
57.5
55.6
70
. 1
52
.0
78
.5
66.0
68.1
5
0.8
7
0.8
48.5
6
3.4
68
.4
64
.3
56
.8
69
.4
74
.8
52.2
76.5
5
3.4
38.2
2
9.0
64
.7
0.5
1.3
2
.6
7.6
8
.1
8.8
9
.3
9.7
10.5
11.3
13.3
13.7
21.2
22.3
22.9
23.7
2
4.2
2
5.2
25.8
2
6.6
27.7
3
2.0
3
2.5
3
3.4
3
5.3
35
.9
3.1
5
8.8
2
11.3
7
14.4
1 14.6
5
18.3
3
20.7
3
24.9
3
27.9
3
32.9
9
33.9
5
34.5
1
37.2
1
40.9
1
43.7
9
44.9
1
46.4
5
49.0
3
53
.58
54.3
9
55
.72
56.9
2
Dea
dlin
e R
idg
e C
ont
inue
d
Bed
no
.
P-1
3
P-1
2
P-l
l P
-10
P
- 9
P-
8 P
- 7
P-
6 P
- 5
P-
4
P-
3 P
- 2
P-
1
Roc
k des
crip
tion
Pho
spha
te r
ock,
ar
gil
lace
ous,
ca
rbo
nat
ic -
Phosp
hat
e ro
ck,
arg
illa
ceo
us
-
Sam
ple
no.
71
72
- R
AS
7
17
1-
RA
S
71
70
- R
AS
7
16
9-
RA
S
71
68
- R
AS
7167-
RA
S
71 6
6-
RA
S
7165-
RA
S
71
64
- R
AS
71
63-
RA
S
7162-
RA
S
71
61
- R
AS
7160-
RA
S
Th
ick
nes
s (f
eet)
2.6
1
.2
1.2
.8
1
.4 .5
2.5
5
.1
.4
3.5
3.4
1.0
1.2
Chem
ical
an
aly
ses
(per
cen
t)
P2°5 1.3
4
.8
8.8
12.6
24.2
3.6
1.1
5.5
1.0
17.9
2. 1
1
8.8
1
4.4
Aci
d in
solu
ble
68.9
34.9
38
. 1
24
.9
14
.5
20
.2
25
.4
45
.3
6.8
2
7.7
5.4
2
7.0
6.9
Cum
ulat
ive
thic
knes
s (f
eet)
38.5
3
9.7
4
0.9
4
1.7
43.1
43.6
46.1
5
1.2
5
1.6
55
. 1
58.5
59.5
60.7
Thic
knes
s x
per
cen
t P
^Cv
(cum
ula
tive;
60.3
0
66
.06
76.6
2
86.7
0
120.5
8
122.3
8
125.1
3
153.
18
153.5
8
21
6.2
3
223.3
7
242.1
7
259.4
5
Wel
ls f
orm
ati
on
no
t m
easu
red
Cw
-1
Fonte
nel
le C
reek
, W
yo.,
lot
1379
Phosp
hori
a fo
rmat
ion
mea
sure
d a
nd p
hosp
hati
c port
ions
sam
pled
fro
m t
wo
bu
lld
oze
r tr
ench
es,
a ha
nd t
rench
, an
d nat
ura
l ou
tcro
p on
sou
th
side
of
Fon
tene
lle
Cre
ek i
n B
ridger
Nat
iona
l F
ore
st,
sec.
35,
T
. 27
N.,
R.
116
W.,
Lin
coln
Cou
nty,
W
yo.
Bed
s st
rike
N.
15*
W.
and
dip
55*
SW.
Sec
tion
mea
sure
d b
y R
. P
. S
held
on,
L.
D.
Car
swel
l,
R.
A.
Sm
art,
an
d E
. R
. C
ress
man
and
sam
pled
by
T.
K.
Rig
by i
n J
une
1952
. S
ampl
es a
naly
zed
by U
. S.
B
urea
u of
Min
es l
abora
tory
, A
lban
y,
Ore
g.
Bed
no
.R
ock
des
crip
tio
nS
ampl
e no
.T
hick
ness
(f
eet)
Ch
emic
al a
nal
yse
s (p
erce
nt)
P2
°5A
dd
in
solu
ble
Cum
ulat
ive
thic
knes
s (f
eet)
Thic
knes
s x
per
cent
Po^
U
(cum
ulat
ive;
Din
woo
dy f
orm
ati
on n
ot
mea
sure
d
1-d-
lIW
TnH
Qto
no
f*
Q T
*hrt
no t i
o--
----
----
..
E (
?) m
emb
er o
f P
hosp
hori
a fo
rmat
ion
E-
4 E
- 3
E-
2 E
- 1
/"* Q
T*h
<"i
na t o
i*
fir*
lf
f"*H
pi»t
w
itH
m
iiH
ct
r>no
r»
aT*t
incr
Q
Ch
ert
Cher
t w
ith
mud
ston
e p
arti
ng
s an
d m
udst
one
-- -- - -- ---
-
71
32
- R
AS
2.2
30.0
1.8
4.1
7.4
15
.52.2
3
2.2
3
4.0
38.1
--
Upp
er s
hale
mem
ber
of
Phosp
hori
a fo
rmat
ion
U-1
8U
-17
U-1
6U
-15
U-1
4
U-1
3U
-12
u-n
u-io
U-
9
U_
Q
U-
7U
- 6
U-
5U
- 4
U-
3U
- 2
U-
1
Ch
ert
Mud
ston
e,
carb
on
atic
- - ---
- -
/"* a
r*H
r>na
tp
i*
ftpt
^H
pi*
tv
Mud
ston
e,
carb
on
atic
-- ---
- - - -
Ch
ert
Mud
ston
e
{"* a
T*H
nn
n t
T
*or*
t aT
*a"i
1 1 a
o^rt
iiQ
Ph
prt
Mud
ston
e,
phos
phat
ic a
nd c
arb
on
atic
"Pho^nH
at^
i*
or*
tC*
a T
*Vir
tna to
i*
rv*
t
71-1
1 _i
r<T
jr«
71 "
%0-
T
TJP
1.3
1.4
1.7 .5
2.1 .4
1.2 ,7
2.7
2.4
1.6
1.7
2
3 .3 .6 .9 .7 .9
^ --
^ 29.2
26.7
» _t>
«
UK
10.4
1.3
2.7
4.4
' 4
.97.0
7.4
8.6
9.3
12.0
14.4
16.0
17.7
20.0
20.3
20.9
21.8
22
.52
^ 4
*_
--
^
.«.
-**
»
*M
M
«.
«.
M
«. «
.
. «
.
Fonte
nel
le C
reek
Co
nti
nu
ed
.
Bed
no
.R
ock
des
crip
tion
Sam
ple
no.
Thic
knes
s (f
eet)
Chem
ical
anal
yse
s (p
erce
nt)
P2
°5A
cid
inso
lub
le
Cu
mu
lati
ve
thic
kn
ess
(fee
t)
Th
ick
nes
s x
per
cent
P2O
c (c
umul
ativ
e)T
Rex
ch
ert
mem
ber
of
Phosp
hori
a fo
rmat
ion
R-2
9
R-2
8
R-2
7
R-2
6
R-2
5
R-2
4
R-2
3
R-2
2
R-2
1 R
-20
R-1
9
R-1
8
R-1
7
R-1
6
^R
-15
COR
-14
R
-13
R-1
2
R-l
l R
-10
R-
9 R
- 8
R-
7 R
- 6
R-
5
R-
4 R
- 3
R-
2 R
- 1
\^cll
UU
flcL
lcr
J U
l*l_
.
Mud
ston
e - -
---
-- _
____
_ _
___
Mud
ston
e,
carb
onati
c--
- - -
-
-
v_» c
xj, u
kJii
cxL
c?
x \j\
+r±
San
dst
on
e,
carb
onat
ic, - --
Cher
t,
san
dy
---
-
-- _
____
San
dst
one,
ca
rbonat
ic -
-- --
Ch
ert
T^V
i^^t
nVis
i tf*
T
*rtf
*lr
r*V
i^T
*tv
C^
Q T
'Vir
tni t
o
T'r
t^lr
f~*
Q Y
'Vir
tn*-
to
~r
*f\f*
]f
TiV
irt*^
.TiV
i*- t
i r*
si
nrf
j^
Vif
^Y't
Ch
ert,
phosp
hat
ic,
carb
onati
c- ---
__.-
C^
fn T
*Vi^
no to
v*
r\f*
\r
Ph
^rt
T?V
i rt
ClY
Vh o
to
T'r
tolf
f*
Vl*
*T
"t'V
(**
QT
*V
irtt
nto
T
'rto
lr
Mud
ston
e - - -
-- -
Ch
ert
and
argil
lace
ous
carb
onat
e ro
ck
-_-
7129
- R
PS
7128
- R
PS
7127
- R
PS
9.0
10.6
43.0
6.0
6
.5 .8
2.8
3.8
3
.6
1.3
1.5
3.3
4.0
6
.5
7.5
7.0
.4
5.0
1.5
.7 .4
.5
.2
.3
2
.3 .64.0
1
.8
3.2
20
.2
7.8
18.4
30
.9
40.6
39
.7
9.0
19.6
6
2.6
68.6
75
.1
75.9
78.7
8
2.5
86
. 1
87
.4
88.9
9
2.2
96.2
102.7
110.2
117.2
117.6
122.6
12
4.1
124.8
125.2
125.7
125.9
126.2
128.5
129.
1 13
3. 1
134.9
13
8. 1
Phosp
hat
ic s
hal
e m
emb
er o
f P
hosp
hori
a fo
rmat
ion
P-4
5
P-4
4
P-4
3
P-4
2
P-4
1
(~*
£1 y
Vi^
FiQ
to
j*f^
f*\r
Mud
ston
e,
carb
onat
ic ---
Mud
ston
e,
carb
on
atic
- - -- ---
7126
- R
AS
7125
-RA
S
7 12
4- R
AS
7123
-RA
S
7122
- R
AS
0.8
.9
5.9
.4
1.0
0.5
1.3
1.
1 .7
1.2
15.8
62.1
63.6
6
3.2
5
9.4
0.8
1.7
7
.6
8.0
9
.0
0.4
0
1.5
7
8.0
6
8.3
4
9.5
4
P-4
0
Car
bonat
e ro
ck,
argil
lace
ous
----
-
--
7121
-RA
SP
-39
Mu
dst
one-
- -
-
7120
-RA
SP
-38
C
arb
on
ate
rock
, ar
gil
lace
ous
----
-
- -
7119
-RA
SP
-37
Mu
dst
on
e-
7118
-RA
SP
-36
C
arb
on
ate
rock
----
----
----
-
7117
-RA
S
P-3
5
Mud
ston
e an
d ch
ert
----
- ---
----
----
--
7116
-RA
SP
-34
Phosp
hat
e rock -
-
7115
-RA
SP
-33
Mud
ston
e,
carb
onat
ic- ---
-- -
_--
__
7114
-RA
SP
-32
P
hosp
hat
e ro
ck
7113
-RA
SP
-31
Mu
dst
on
e-
7112
-RA
S
P-3
0
Phosp
hat
e ro
ck
---
7111
-RA
SP
-29
Phosp
hat
e ro
ck,
argil
lace
ous
-- ---
----
--
7110
-RA
SP
-28
Phosp
hat
e ro
ck,
argil
lace
ous
----
7109
-ER
CP
-27
P
hosp
hat
e rock --
7108
-ER
CP
-26
M
udst
one
and
calc
areo
us
phosp
hat
e ro
ck--
--
7107
-ER
C
P-2
5
Phosp
hat
e ro
ck,
argil
lace
ous
and
car
bonat
e ro
ck -
-- -
- ---
- --
7106
-ER
CP
-24
Car
bonat
e ro
ck,
argil
lace
ous
-----------
7105
-ER
CP
-23
Mud
ston
e,
carb
on
atic
--
----
----
----
-- --
7104
-ER
CP
-22
M
udst
one
- _
____
-
- --
7103
-ER
CP
-21
Mud
ston
e
7102
-ER
C
P-2
0
Mud
ston
e ---- -
-
7101
-ER
CP
-19
Mud
ston
e,
carb
on
atic
--
----
----
----
---
71
00-E
RC
P-1
8
Mud
ston
e,
carb
onat
ic --
----
----
----
----
--
7099
-ER
CP
-17
Mud
ston
e,
carb
onat
ic --
----
----
----
----
--
7098
-RA
SP
-16
C
arb
onat
e ro
ck,
argil
lace
ous
----
-- ---
- 70
97-R
AS
P-1
5
Mud
ston
e,
ph
osp
hat
ic,
carb
on
atic
--
----
---
70
96
-RA
SP
-14
Car
bonat
e ro
ck
----
----
----
----
----
----
--
7095
-RA
SP
-13
Phosp
hat
e ro
ck,
argil
lace
ous,
ca
rbonat
ic --
7
09
4-R
AS
P-1
2
Car
bo
nat
e ro
ck,
argil
lace
ous
-- ---
- -
7
09
3-R
AS
P-l
l C
arb
on
ate
rock
, ar
gil
lace
ous
----
--- -
-
7092
-RA
S
P-1
0
Mud
ston
e --
--- _
____
____
_ _
___
P-
9 C
arb
on
ate
rock
, ar
gil
lace
ous
----
---
- -
7091
-RA
SP
- 8
Mud
ston
e,
carb
on
atic
- -
______-_
___-_
_
70
90
-RA
SP
- 7
Car
bo
nat
e ro
ck--
--- - ---
-- -
7
08
9-R
AS
P-
6 P
hosp
hat
e ro
ck -
---
--- _
____
____
___
7088
-RA
S
P-
5 P
hosp
hat
e ro
ck,
arg
illa
ceo
us,
ca
rbon
atic
--
70
87-R
AS
P-
4 C
arb
on
ate
rock
, p
ho
sph
ati
c--
- _
----
-__
_
7086
-RA
SP
- 3
Phosp
hat
e ro
ck--
- ---
- -
7085
-RA
SP
- 2
Car
bo
nat
e ro
ck,
argil
lace
ous
--- ----
7084
-RA
SP
- 1
Phosp
hat
e ro
ck,
argil
lace
ous
----
-- ---
- 70
83-R
AS
.8
3.2
1.
1 .8
1.5 .5
2.6
2.7
1.0
1.
1
1.2
1.
5 .9
1.8 .7 1.8
1.7
1.2 .9 .7
2.7
3.9
3.1
2
.2 1.3 .6 1.4
3.9
2.8
.8
2.9 .8
1.5
3.3 .9 1.9
1.4 .4 .5 .7
1.9
K
5
.6
2.2
1.0
5.3
34.3 .5
31
.85.3
30.6
23
.92
6.6
22
.712.0
18.6
1. 5 .2 .4
3.2
3.9
.7
.5
5.9
.6
11.4
2.5
14.4
1.7
4,7
3.9
7.5
6.8
24,1
15.
513.4
25
.01
.42
5.2
22
.26
7.1
22
.964.0
1.3
64.3 1.3
64.3
3.9
70
.8
7. 1
23
.617.7
9.7
24
.4
35
.024
.15
7.7
70.4
62
.4
71
.95
3.8
45.8
44.7
22
.6
37.2
15.6
18.1
20.1
29.3
22
.642.8
14.6
11.4
17
.37.8
4.6
35.9
23.1
9.8
13.0
14.1
14.9
16.4
16.9
19.5
22.2
23.2
24.3
25
.527.0
27.9
29.7
30
.4
32
.233.9
35.1
36
.036.7
39
.443.3
46
.44
8.6
49.9
50
.551.9
55
.858.6
59.4
62.3
63.1
64.6
67.9
68
.8
70.7
72.1
72
.573.0
73
.7
11.0
615.8
616.5
218.2
819.7
8
22.4
311
1.61
112.9
6144.7
615
0.59
187.
31223.1
6247.1
0287.9
6296.3
6
329.8
4332.3
9332.6
3332.9
9335.2
3
345.7
6348.4
9350.0
4363.0
2363.8
0
370.6
4374.1
4430.3
04
35
.06
438.8
2
*3.
12
14.3
7
36.8
1 58.5
0
87
.95
106.
7111
6.71
117.
41**135.0
5
* C
umul
ativ
e dat
a in
com
plet
e b
ecau
se o
f m
issi
ng i
nfor
mat
ion.
C
ompu
tati
ons
star
t fr
om z
ero
afte
r in
terr
upti
on.
'* N
ote
inco
mpl
eten
ess
of c
umul
ativ
e da
ta.
Fo
nte
nel
le C
reek
Co
nti
nu
ed
Bed
no
.R
ock
des
crip
tion
Sam
ple
no
.T
hic
knes
s (f
eet)
Ch
emic
al a
nal
yse
s ___(p
erc
ent)
___
P2
°5A
cid
inso
lub
le
Cum
ula
tive
thic
kn
ess
(fee
t)
Th
ick
nes
s x
per
cent
P2O
c (c
um
ula
tive;
Wel
ls f
orm
ati
on u
pper
par
t on
ly
Cw
- 1
Car
bonat
e ro
ck -
________ _
__
Cw
- 2
Cher
t,
carb
onat
ic --- -
-----
Cw
- 3
Cher
t --
----
----
----
----
----
----
----
-C
w-
4 C
arb
on
ate
rock
and
cher
ty,
argil
lace
ous
car
bonat
e ro
ck --
Cw
- 5
Ch
ert
Cw
- 6
Ch
ert,
ca
rbo
nat
ic a
nd c
hert
- -
Cw
- 7
Ch
ert
and
carb
onat
ic c
hert
-
Cw
- 8
Mud
ston
e - - --
Cw
- 9
Ch
ert
and
carb
on
atic
ch
ert
__
__
__
__
__
Cw
-10
C
her
t,
carb
on
atic
__
_ _
__ _
-_
_
__
Cw
-11
Cher
t an
d ca
rbo
nat
ic c
her
t -
Cw
-12
C
arbo
nat
e ro
ck,
argil
lace
ous
- _
____
Cw
-13
C
arbo
nat
e ro
ck,
argil
lace
ous
------
Cw
-14
Mud
ston
e --
- ___________ _
____
_ _
_C
w-1
5
San
dst
on
e, carb
onati
c _
Cw
-16
San
dst
one,
carb
onati
c -
3.5
3
.0
10.3 .8 .4
5.0
4.8
5.0
4.2
1.9 .7 .5
3.4
1.3
5.7
8.2
11
.714.7
25
.025.8
26
.231.2
36
.0
41.0
45.2
47.1
47
.84
8.3
51.7
Bas
in C
reek
, W
yo.
, lo
t 13
81
Ph
osp
ho
ria
form
atio
n m
easu
red
and
sam
ple
d f
rom
bull
doze
r tr
ench
es a
nd n
atura
l ex
posu
re o
n th
e n
ort
h s
ide
of B
asin
Cre
ek o
n th
e w
est
lim
b o
f a
doub
ly p
lung
ing
anti
clin
e,
sees
. 12
and
13,
T
. 26
N.,
R.
11
7|
W.,
Lin
coln
Cou
nty,
W
yo.
Bed
s st
rike N
. 30
» W
. an
d di
p 45
» W
. S
ecti
on m
easu
red
by
R.
A.
Sm
art,
T
. M
. C
hene
y,
and
L.
D.
Car
swel
l an
d sa
mp
led
by
Sm
art
and
T.
K.
Rig
by i
n J
uly
195
2.
Sam
ple
s an
alyze
d b
y U
. S.
B
ure
au o
f M
ines
lab
ora
tory
, A
lban
y,
Qre
g.
Bed
no
.R
ock
des
crip
tio
nS
ampl
e no
.T
hic
knes
s (f
eet)
Chem
ical
anal
yse
s (p
erce
nt)
P2°5
Aci
d in
solu
ble
C u
mu
lati
ve
thic
kn
ess
(fee
t)
Thic
knes
s x
per
cent
PI^
K
(cum
ula
tive)
?
Din
woo
dy f
orm
atio
n n
ot m
easu
red
Upper
shal
e m
emb
er o
f P
hosp
hori
a fo
rmat
ion
U-1
7 U
-16
U-1
5 U
-14
U-1
3
U-1
2u
-n
u-io
U-
9 U
- 8
U-
7 U
- 6
U-
5 U
- 4
U-
3
U-
2 U
- 1
Mud
ston
e,
ph
osp
hat
ic--
-
Mud
ston
e,
phosp
hat
ic--
- - -
Mud
ston
e - - -
-
- -
-
Bed
s U
-4,
U-3
, an
d U
-2 a
re f
ract
ure
d
and
cut
by f
ault
s.
Phosp
hat
e ro
ck,
cher
ty a
nd p
hosp
hat
ic
7276-
RA
S
7275-
RA
S
7274-
RA
S
7273-
RA
S
72
72
- R
AS
7271-
RA
S
7270-
RA
S
7269-
RA
S
7268-T
MC
7267-T
MC
7266-T
MC
7265-T
MC
7264-
LD
C
1.2
.9
1.
1
1.7
1.3
1.2
.9
2.3
.5
.2 .4
1
.0
13.0
5.0
2.0
1.0
2.1
18.2
26.4
25.5
24.6
21.5
22
.0
22.
1 19.1
13.9
12.6
4.6
2
4.5
21.6
39.8
18.6
2
3.8
2
7.1
33.2
33.5
31.7
40.0
51.3
5
9.9
62
.9
30
.0
39.4
1.2
2.1
3.2
4.9
6.2
7.4
8
.3
10.6
11
.1
11.3
11.7
12.7
2
5.7
3
0.7
32
.7
33.7
35.8
21
.84
45.6
0
73
.65
1
15
.47
143.4
2
169.8
2
189.7
1
23
3.6
4
240.
59
243.1
1
244.
95
*269.4
5
Rex
cher
t m
emb
er o
f P
hosp
hori
a fo
rmat
ion
R-2
1C
arbonat
e ro
ck a
nd c
her
ty c
arbonat
e
Bed
R-2
1 pro
bab
ly c
ut b
y fa
ult
.
Cum
ulat
ive
dat
a in
com
plet
e b
ecau
se o
f m
issi
ng i
nfor
mat
ion.
--25.0
25.0
--
Bas
in C
reek C
onti
nued
Bed
no
.
R-2
0
R-1
9
R-1
8
R-1
7
R-1
6
R-1
5
R-1
4
R-1
3
R-1
2
R-l
l
R-1
0
R-
9 R
- 8
R-
7 R
- 6
R-
5S
R
- 4
R-
3 R
- 2
R-
1
Roc
k des
crip
tion
Mudst
one-
- -- ---
---
- - -
Phia
rt _
_____________-__-_----------------
Cher
t an
d m
udst
one -
---
- -- -
Cher
t an
d m
udst
one-
-
-
---
---
--
\_sC
Ll
UU
IlcL
lc?
i U
LrK
j C
IIC
X L
jr «
«
«
» »
»
Ch
ert
and
mudst
one-
---
----
- ---
---
--P
hosp
hat
e ro
ck -
- - - - -
-
JViU
UolU
Ilt?
cL
IIU
L
*Ilc
?X ^
Mudst
on
e-- - -
---
---
- - ---
-
Sam
ple
no.
Thic
knes
s (f
eet)
5.0
2
.0
5.0
2
0.0
5.0
4.0
30.0
4.5
.3
2.6
3.3
6.0
7.5
12.0
2.0
1.9
1
.2
1.4
.8
2.3
Ch
emic
al a
nal
yse
s (p
erce
nt)
P2°5
Aci
d
inso
luble
Cum
ula
tive
thic
knes
s (f
eet)
30
.0
32
.0
37
.0
57.0
62.0
66
.0
96
.0
100.5
100.8
103.4
106.7
112.7
120.2
132.2
134.2
136.
1 137.3
138.7
139.5
141.8
Thic
knes
s x
per
cent
P2O
c (c
um
ula
tive^
Phosp
hat
ic s
hal
e m
emb
er o
f P
hosp
hori
a fo
rmat
ion
P-5
1
P-5
0
P-4
9
P-4
8
P-4
7
P-4
6
P-4
5
P-4
4
P-4
3
P-4
2
P-4
1
P-4
0
P-3
9
P-3
8
P-3
7
P-3
6
P-3
5
P-3
4
Mudst
one-
- ---
---
-- ---
M
udst
one,
p
ho
sph
atic
, ca
rbo
nat
ic
Car
bonat
e ro
ck,
argil
lace
ous
----
M
udst
one,
phosp
hat
ic - ---
-
Phosp
hat
e ro
ck -
--- ---
-
Mu
dst
on
e--
----
- ---
----
---
Phosp
hat
e ro
ck -
--- -
- -
Phosp
hat
e ro
ck,
argil
lace
ous
Phosp
hat
e ro
ck -
-
-
---
-M
ud
sto
ne--
----
----
----
---
Phosp
hat
e ro
ck,
argil
lace
ous
Mud
ston
e --
----
----
----
----
Phosp
hat
e ro
ck a
nd m
udst
one-
M
udst
one
----
---
- - -
Phosp
hat
e ro
ck,
argil
lace
ous
7260
- R
AS
7259
- R
AS
7258
- R
AS
7257
- R
AS
7256
- R
AS
7255
- R
AS
7254
- R
AS
7253
- R
AS
7252
- R
AS
7251
- R
AS
7250
- R
AS
7249
- R
AS
7248
- R
AS
7247
- R
AS
Mud
ston
e M
udst
one
Mud
ston
e
1.0 .5
2.6
2.7 .5 .3 1.7
1.8 .8
.7 .3
2.0 .6
.6
.3 .9 .72.2
32.9
35.6
10.7
31.1 3.5
32.4
26.8
32.7 1.5
23.8 2.4
22.5
1.4
27.4
12.4 3.4
63.6
14.0
79.8
11.5
22.5
13.0
85.6
28.5
83.5
30.1
82.1
19.3
1.0
1.5
4.1
6.8
7.3
7.6
9.3
11.1
11.9
12.6
12.9
14.9
15.5
16.1
16.4
17.3
18.0
20.2
6.20
98.76
127.
6514
3.20
144.
2519
9.33
247.
5727
3.73
274.78
281.92
286.
72300.22
301.06
309.28
P-3
3
P-3
2
P-3
1
P-3
0
P-2
9
P-2
8
P-2
7
P-2
6
P-2
5
P-2
4
P-2
3
P-2
2
P-2
1
P-2
0
P-1
9
P-1
8
P-1
7
P-1
6
P-1
5
P-1
4
_
P-1
3
-a
P-1
2
P-l
l P
-10
P
- 9
P-
8 P
- 7
P-
6 p-
5 P
- 4
P-
3 P
- 2
P-
1
Mud
ston
e - -
Mud
ston
e,
phos
phat
ic -
Pho
spha
te r
ock
- -
Mudst
one-
- - -
/^a T
^H
nn
ato
T
*fv*
lr
a T
*eri
11 a
r»orm
Q
Mu
dst
on
e--
----
----
----
----
-.-.
--.-
_
-__
-_--
"PH
ncri
Ha to
r*n
olr
a.
T*e
n* 1
la r
*f*r
\\i c
=
"Pli
r\c:
r\H
a to
T
*nr»
lr
a T
*cfi
1 1 a
r»
om
i cs
Mud
ston
e,
phosp
hat
ic a
nd m
ud
ston
e -
Car
bonat
e ro
ck
arg
illa
ceo
us-
----
----
_ ---
Mud
ston
e an
d phosp
hat
e ro
ck -
----
----
----
-"O
l^r^
cri
Ha to
T*<"
kf*l
r
*OV
i r\e
r\V
i Q
to
T*o
r»lr
a t*
cH 1
1 a
f»
or\
n c
C* a
T*V
\rtn
a to
T
*Of*
lr
a T
* tfi
1 1 a o
o r
tn Q
Pho
spha
te r
ock
- -
"PH
rk
ttri
Ha to
T*
r\r*
\r
"Pli
ntt
nH
a to
t*r\
f*\r
a T
* tfi
1 1 a r*
om
i ft
"OV
i r\<
sr\h
a to
T
*nf*
lr
a T
*cfi
1 1
af*
o r
tn c
s
Sam
ple
7263
-LD
C r
epre
sents
bed
s P
-l a
nd
P-2
, bu
t ta
ken
in
road
cu
t be
low
mea
sure
d
sect
ion
.
7246
- R
AS
7245
- R
AS
72
44-
RA
S 72
43-
RA
S
7242
- R
AS
72
41-
RA
S 72
40-
LD
C
7239
- L
DC
72
38-
LD
C
7237
- L
DC
72
36-
LD
C
7235
- L
DC
72
34-
LD
C
7233
- L
DC
7232
- L
DC
72
31-
LD
C
7230
- L
DC
72
29-
LD
C
7228
- L
DC
7227
- L
DC
72
26-
LD
C
7225
- L
DC
72
24-
LD
C
7223
- L
DC
72
21
-LD
C
7220
- L
DC
72
19-
LD
C
72
63
-LD
C
1.2
3.4
1
.4
1.6
1
.3
2.7
3.5
.7
.7
1
.2
1.0
.6
3.5
1
.8
.7
2.5
.6
.7
.7
.6 1.0
1
.5
.8
2.7
1.7 .6
1
,3
.3
1.0
1
.7 .7
.8
1. 1
(1
.9)
*
*
14.1
2
7.9
32.5
3.2 .5
2.6
17.3
2
2.7
2
1.3
3.6
15.2
33.5
3
2.3
26.8
28
.7
14.7
6.3
2.3
2
9.9
4.2
.5
4.1
3.0
4.7
31.0
30.5
16.7
2
6.2
35.7
18.2
7
.1
60
.7
35
.7
80
.2
40.6
2
8.6
3
4.7
23
.9
50
.3
8.2
5.
1
18.6
9.6
41.6
5
5.7
39.8
17.7
68
.7
77
.3
73
.6
78.3
5
5.7
10.3
18
. 1
34
.4
28
.7
21.4
2
4.8
2
6.2
2
7.8
29.1
31
.8
35
.3
36.0
3
6.7
3
7.9
38
.9
39
.5
43.0
44.8
4
5.5
48.0
4
8.6
4
9.3
50.0
50.6
51.6
53.1
5
3.9
56.6
58.3
58.9
60.2
6
0.5
6
1.5
6
3.2
63
.9
64
.7
65
.8
*49.3
5
68
.88
9
1.6
3
95
.47
95
.97
97.5
3
158.0
8
198.9
4
213.8
5
222.8
5
231.9
7
255.4
2
278.0
3
294.
11
322.8
1
344.8
6
349.9
0
356.1
1
40
6.9
4
409.4
6
410.1
1
411.3
4
414.3
4
42
2.3
3
44
4.0
3
468.4
3
**486.8
0
Wel
ls f
orm
atio
n u
pper
part
onl
y
Cw
-1
Cw
-2
0.7
8.0
~"*
.
0,7
8
.7--
* C
umul
ativ
e da
ta i
ncom
plet
e be
caus
e of
mis
sing
inf
otm
atio
n.
Com
puta
tions
sta
rt f
rom
zer
o af
ter
inte
rrup
tion
. "N
ote
inc
ompl
eten
ess
of c
umul
ativ
e da
ta.
Bas
in C
reek
Co
nti
nu
ed
Bed
no
.R
ock
des
crip
tio
nS
ampl
e no
.T
hick
ness
(f
eet)
Ch
emic
al a
nal
yse
s (p
erc
en
t)_
__
P2°5
Aci
d in
solu
ble
Cum
ulat
ive
thic
knes
s(f
eet)
Thic
knes
s x
per
cen
t P
2Rs
(cum
ulat
ive)
r
Cw
- 3
Car
bonat
e ro
ck
- -
------
- _
C
w-
4 P
hosp
hate
roc
k,
argil
lace
ous -
7262
-LD
CC
w-
5 C
arbonat
e ro
ck--
--- ---
----
--- -_
- C
w-
6 M
udst
one - _
____
_C
w-
7 C
arbon
ate
rock - --
Cw
- 8
Mud
ston
e - -
Cw
- 9
Pho
spha
te r
ock,
ar
gil
lace
ous
7261
-LD
CC
w-1
0 C
over
ed i
nte
rval
- - - -
Cw
-11
Car
bonat
e ro
ck- - - -
Cw
-12
San
dsto
ne -
- - - -
Cw
-13
Mud
ston
e --
----
----
----
----
----
----
---
Cw
-14
San
dsto
ne - - T
-C
w-1
5 S
ands
tone
- - -
0.9
.3
3.0
1
.0
5.0
3.0
.3 7.0
.2
1.7
1.7
1.0
1.5
22
.2
21.3
20.5
42.3
9.6
9.9
12.9
13.9
18.9
21.9
22.2
29.2
29.4
31.1
32.8
33.8
35.3
00
Wes
t B
ranc
h of
Ham
s F
ork
Cre
ek,
Wyo
., lo
t 13
83
Par
tial
sec
tion o
f th
e U
pper
shal
e m
ember
of
the
Ph
osp
ho
ria
form
atio
n m
easu
red
and
sam
pled
in
a ha
nd t
rench
on
the
Wes
t B
ranc
h of
H
ams
Fork
Cre
ek,
at t
he m
outh
of
Roc
k C
reek
, se
c. 2
4,
T.
26 N
., R
. 11
7 W
., L
inco
ln C
ount
y,
Wyo
. B
eds
stri
ke
N.
35*
E.
and
dip
25*
S.
Sec
tion
mea
sure
d b
y T
. M
. C
hene
y an
d sa
mpl
ed b
y T
. K
. R
igby
in
Aug
ust
1952
. S
ampl
es a
naly
zed
by U
. S.
Bur
eau
of
Min
es l
abo
rato
ry,
Alb
any,
O
reg.
Bed
no
.R
ock
des
crip
tio
nS
ampl
e no
.T
hick
ness
(f
eet)
Chem
ical
an
aly
ses
(per
cent
)
P2
°5A
cid
inso
lubl
e
Cum
ulat
ive
thic
knes
s (f
eet)
Thic
knes
s x
per
cent
PoO
c (c
umul
ativ
e f
Din
woo
dy f
orm
atio
n b
asal
bed
onl
y
1-d-
l
3.0
3.0
--
Upp
er s
hale
mem
ber
of
Ph
osp
ho
ria
form
ati
on u
pper
par
t on
ly
UQ
U-
7U
- 6
U-
5U
- 4
U-
3U
- 2
"-1
TT
- 1
Mud
ston
e,
phosp
hat
ic- -
Mud
ston
e,
cher
ty -
--- - - -
Mud
ston
e,
cher
ty -
- ---
--
Mud
ston
e,
cher
ty a
nd m
udst
one
Ch
ert
- -
-
7700
rrr+
rt-i
It tit
T^K
IM"*
70
01
m
um
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1M
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1 £>
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- Im
Lx
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s
j. jyi
iwr
TO
OT
T
'TH
W'
7277-T
MC
1.2 .5 1.3
2. 1
1.6
2.6
1.0
16.0
5.7
13.7
2.9
1.7
1.4
1.6
43.
1L
-)
Q
55.4
QR
Q
03
. ?
87.4
1
85.5
1.2
1.7
2.5 .
o5.9
7.5
10.
111.1
19
.20
2
2.0
53
3.0
1It
*
*7Q
40.3
5
4?
5046.7
5
Whe
at C
reek
, W
yo..
lot
1378
Phosp
hori
a fo
rmat
ion
mea
sure
d a
nd p
hosp
hati
c port
ions
sam
pled
in
bull
doze
r tr
ench
on
wes
t li
mb
of a
ntic
line
nea
r th
e he
ad o
f W
heat
Cre
ek,
sec.
4,
T.
23 N
., R
. 11
6 W
., L
inco
ln C
ount
y,
Wyo
. B
eds
stri
ke
nort
h an
d di
p 60
* W
. S
ecti
on m
easu
red a
nd s
ampl
ed b
y E
. R
. C
ress
man
, L
. D
. C
arsw
ell,
R
. A
. S
mar
t,
and
R.
P.
She
ldon
in
June
195
2.
Sam
ples
ana
lyze
d by
U.
S.
Bur
eau
of M
ines
la
bo
rato
ry,
Alb
any,
O
reg.
Bed
no
.R
ock
des
crip
tio
nS
ampl
e no
.T
hick
ness
(f
eet)
Ch
emic
al a
nal
yse
s (p
erce
nt)
P2°5
Aci
d in
solu
ble
Cum
ulat
ive
thic
kn
ess
(fee
t)
Thic
knes
s x
per
cent
P2^
5
(cu
mu
lati
ve/
E (
?) m
emb
er o
f P
hosp
hori
a fo
rmat
ion to
p no
t ex
pose
d
Ez
EC
E-
4
E_
!
E_
0
E_
1
Ch
ert
Mud
ston
e,
phos
phat
ic
- -- ---
-- _
Ch
ert
Ch
ert -- ---
----
__ --
18.0 .3
8.5 .5
4.6
2.9
__ _
__ _M _ -
__ __ __ _
_
18.0
18.3
26
.827.3
31
.9
34
.8
__ __ _ _
_
__
Upp
er s
hale
mem
ber
of
Ph
osp
ho
ria
form
atio
n
Uo
U-
7U
- 6
U-
5U
- 4
U-
3U
- 2
U-
1
"P
HoQ
FlJ
TQ
to
T
*fV
*lr
9 T
*tf
l 1
1 Q
r*tf
i/"i
ll Q
Mud
ston
e -- -- - -- -- ---
--
Mud
ston
e - - -- -- -- -
Mud
ston
e -- ---
-- ---
-- ---
- -
Mud
ston
e - -- -- ---
- - -- ---
Pho
spha
te r
ock,
ar
gil
lace
ous
-- --
Tfi
ft?-
ft A
Q
7081
-R
AS
1.2
1.7
3.6
9.6
3.2 1.1 .7 1. 1
22.7
-.
.
25.1
»
25.
1
_ _
__ __ 15.6
1.2
2.9
6.5
16.1
19.3
20
.421.1
22
.2
__
__
__ __.
_
__
Rex
ch
ert
mem
ber
of
Phosp
hori
a fo
rmat
ion
R-2
2
R-2
1
R-2
0
R-1
9
R-1
8
R-1
7
R-1
6
R-1
5
R-1
4
R-1
3
R-1
2
R-l
l
Car
bona
te r
ock,
ar
gil
lace
ous
Cov
ered
inte
rval-
----
--- -
C
arbo
nate
roc
k,
sand
y --
----
Chert -
C
arbo
nate
ro
ck -
----
- _
-__.
Ch
ert
and
phos
phat
e ro
ck
Car
bona
te r
ock
- ---
-P
hosp
hate
ro
ck -
----
--
Car
bona
te r
ock
---
----
P
hosp
hate
ro
ck -
- -
Car
bona
te r
ock
P
hosp
hate
rock
7080
-RP
S
7079
-RP
S
70
78
-RP
S
8.4
11
2.5
10.0
9.0
1.3 .6
4.0 .5
2.5
.3
2.6
1.5
32.5
31.0
29.3
2.7
4.7 3.7
8.4
120.
913
0.9
139.
914
1.2
141.
814
5.8
146.
314
8.8
149.
1
151.
715
3.2
Ril
O
R-
9 R
- 8
R-
7 R
- 6
R-
5
R-
4 R
- 3
R-
2 R
- 1
Car
bonat
ro
kP
hosn
hate
rock
Car
bonat
e ro
ckP
hosn
hate
rock
f* sk
T*V
iona
to
T
*rv
*t
a T
*tfi
1 1
a r*
oo
ii c
z
San
dst
one,
ca
rbo
nat
ic a
nd s
and
y
Ch
ert
--
/""*
V|r
f3iT
*t
_
.
j*
.
. _
_
7077
- R
PS
7076
- R
PS
70
75-
RP
S
1.5
.5
1
.0
1.0
2
.0
13.5
1.5
9
.0
8.0
13.0
26
.9
27.7
1.9
12
.5
15.2
2
8.6
154.7
155.2
156.2
157.2
159.2
172.7
174.2
183.2
191.2
2
04
.2
--
Phosp
hat
ic s
hal
e m
ember
of
Phosp
hori
a fo
rmat
ion
P-3
4
P-3
3
P-3
2
P-3
1
P-3
0
P-2
9
P-2
8
P-2
7
P-2
5
P-2
4
P-2
3
P-2
2
P-2
1P
-20
P-1
9
P-1
8
P-1
7
P-1
6
P-1
5
P-1
4
P-1
3
P-1
2
P-l
l P
-10
P-
9 P
- 8
P-
7 P
- 6
P-
5
Mud
ston
e,
carb
on
atic
and
phosp
hat
e ro
ck--
-
Mu
dst
one - - -
-
Mud
ston
e - ---
-
Car
bonat
e ro
ck,
cher
ty a
nd a
rgil
lace
ous
Car
bo
nat
e ro
ck,
argil
lace
ous,
phosp
hat
ic
Phosp
hat
e ro
ck a
nd a
rgil
lace
ou
s
Mud
ston
e - -
Phosp
hat
e ro
ck,
argil
lace
ous
--- -
-
Phosp
hat
e ro
ck,
arg
illa
ceo
us
-
Phosp
hat
e ro
ck
- - - -
--
7074
-ER
C
70 7
3 -E
RG
70
72-E
RC
70
71 -
ER
G
70 7
0 -E
RG
7069
-ER
C
7068
-ER
C
7067
-ER
C
7066
-ER
C
7065
-ER
C
70 6
4 -E
RG
70
63-E
RC
7062
-ER
C
7061
-E
RG
70
60 -E
RG
70 5
9 -E
RG
7058
-ER
C
7057
-ER
C
7056
-ER
C
7055
-ER
C
70
54
-ER
C
7053
-ER
C
7052
-ER
C
7051
-E
RG
70
50-E
RC
7049
-ER
C
7048
-ER
C
7047
-ER
C
7046
-ER
C
7045
-ER
C
0.7
1.3
1.2
2.9
1.1
2.3
2.5
2
.1
1.9
4.1 2.3
3
.8 1.9
1.0
.5
3.4
2.2
2.5
2
.5 1.4
1.5
2.5
1.7
1
.8
.6
3.2
.5
.5
1
.4
.6
17.4
1.5
.4
10.9
11.4
1.3
2
.2
.5
5.8
.3 .6
5.8
2.8
12.2
1
.4
9.1
16.9
1
.0
7.6
11.5
8.2
15.3
2
6.3
1
6.2
2
2.4
4.5
20.4
7
.9
34
.0
27.7
36.8
80.9
3
6.3
5
1.4
37.6
10.9
7
2.8
3
5.9
67.5
37.2
85
.4
39
.6
24.6
4
1.1
2
6.4
27.6
15.9
38.4
51.5
24
. 1
42.4
28.7
1
5.6
29.4
2
4.8
12.5
30.7
5
9.1
2.6
1
6.5
0.7
2
.0
3.2
6
.1
7.2
9.5
12.0
14
.1
16.0
20.1
22.4
2
6.2
28.1
29.1
2
9.6
33
.0
35.2
37.7
40.2
4
1.6
43.1
4
5.6
47.3
49
. 1
49.7
52
.9
53
.4
53.9
55.3
5
5.9
12.1
8
14.1
3
14.6
1 46.2
2
58.7
6
61.7
5
67.2
5
68
.30
7
9.3
2
80.5
5
81.9
3
103.9
7
109.2
9
121.4
9
122.1
9
153.1
3
190.
31
192.
81
211.8
1
227.9
1
240.
21
278.4
6
32
3.1
7
352.3
3
365.7
7
380.
17
390.3
7
39
4.3
2
44
1.9
2
458.
54
Whe
at C
reek
Co
nti
nu
ed
Bed
no
.
P-
4 P
- 3
P-
2 P
- 1
Roc
k des
crip
tion
Mud
ston
e - -
-
-- ---
Sam
ple
no.
7044
-ER
C
7 043
-E
RG
70
42-E
RC
70
41 -
LD
C
Thic
knes
s (f
eet)
.8
1.8
.5
1.4
Ch
emic
al a
nal
yse
s (p
erce
nt)
P2°5
17.3
2.0
13.2
2
5.5
Aci
d in
solu
ble
34.2
6
6.7
40.8
14.9
Cum
ula
tive
thic
knes
s (f
eet)
56.7
5
8.5
59.0
6
0.4
Th
ick
nes
s x
per
cent
P^O
c (c
um
ula
tiv
e)
472.3
8
475.9
8
482.5
8
518.2
8
Wel
ls f
orm
ati
on u
pper
part
onl
y
Pw
- 1
Pw
- ?
Pw
- ^
Q^V
- 4
Pw
- 5
P w
- A
P w
- 7
Cw
- 8
P w
- 9
r1 w
-i o
Cw
-l 1
Pw
-12
Pw
-13
Pw
-1 4
Pw
-1 5
Cw
-16
Cw
-17
Cw
-18
Pw
-1 Q
Pw
-20
Pw
-21
Pw
-7?
Cw
-23
Pw
-?4
P w
-?S
Cw
-26
Pw
-27
Cw
-28
Cw
-29
C
w-3
0
Pw
-31
Pw
-32
Pw
-'?'?
P 9
T»h
r\n
Q f
o
T* r\
r* \r
Mud
ston
e,
carb
on
atic
- - -
-- -
-
Mud
ston
e,
sandy - -
-
---
-
-
Mud
ston
e,
argil
lace
ous
-- -
-
--
Mudst
one--
--- - -- - -- --
P 9
T*H
nna t^
T
*nol
r 9
T*cn
HP
PA
fill
QM
udst
one -
-
-- - - - -
P>
lOT
-t
Mudst
one-
- - -
- -
-
-
--
Mudst
one-
-- -- -
---
-
---
-P
9 T
*hn
n9
i"c*
T
*nr*
lr ........_..
__
.._
..
__
..
_ _
P 9
T*h
r\ n
9 1
o
T* r\
c* \r
P 9
T*h
f\n
a 4*
o
T* n
r* lr
9
T* c
r "i 1
1 9 o
c* rw
i Q
P 9
T*
hn
n9
1^
v*r\
f*\c
9
T*C
FI 1
1 9
f*tf
*fiii
Q
_ _
_ _
Co
nH
Qtn
nP
*
P9
T*H
nr»9
ti
P
. _
» .
» .
San
dst
one,
ar
gil
lace
ous --
-
-
- - -
Car
bo
nat
e ro
ck,
argil
lace
ous
and
cher
t ....
Ch
ert,
ar
gil
lace
ous
- - - -
Cher
t
P 9
T*V
l C\T
\ 9 t O
T
* f"
4P
If
7040
- R
AS
7039-
T? A
<?
*7H
1O
"D
A
G
7037-
RA
S
--
3.7
2.6 .8
2.7
4.9
2. 1
3.6
4.6 1. 1
2.0 .4 .3
2.1
1.7
1.5 .6
1.2
3.2 .5
1.2 .9
1.1 .4 .3
2.2
3.0
4.6 .7
1.5 .7
4.6
2.7
_
^
_
_ 8.4
8.2
7.2
4.5
M _ fc-
^^ ^^ _ fc-
57
.5
*»w
__
M
42.7
57
.5
46.9
3.7
6.3
7.1
9.8
14.7
16.8
20
.425.0
26.1
28
1
28
.528.8
30
.93
2.6
34.1
34
.735.9
39.1
39
.640.8
41.6
4?
143.6
44
.04
4.3
46
.549.5
54.1
54
.8
56.3
57.0
61
.66
4.3
-*
_..
_
_M
__
_
_
_ .
_*
__ W
M
-.
» »
_..
_
.M
l
-w
Sou
th M
ount
ain
Pit
and
Min
e,
Wyo.,
lot
1382
Part
ial
sect
ion
of
the
Phosp
hori
a fo
rmat
ion
mea
sure
d a
nd s
om
e phosp
hat
ic p
ort
ion
s sa
mple
d i
n e
xposu
re i
n o
pen
pit
min
e an
d in
min
era
ise o
n S
outh
Mou
ntai
n,
13 m
iles
nort
hw
est
of K
emm
erer
, se
es.
8 an
d 9,
T
. 23
N.,
R.
116
W.,
Lin
coln
Cou
nty,
W
yo.
Bed
s st
rik
e n
ort
h a
nd d
ip m
od
erat
ely
to
the
wes
t.
Sec
tion m
easu
red b
y R
. A
. S
mar
t an
d L
. D
. C
arsw
ell
and
sam
ple
d b
y T
. K
. R
igby
in
July
195
2.
Sam
ple
s an
aly
zed
by
U.
S.
Bu
reau
of
Min
es l
abo
rato
ry,
Alb
any,
O
reg.
Bed
no
.R
ock
des
crip
tion
Sam
ple
no.
Thic
knes
s (f
eet)
Ch
emic
al a
nal
yse
s (p
erce
nt)
P2
°5A
cid
inso
lub
le
Cum
ula
tive
thic
knes
s (f
eet)
Thic
knes
s x
per
cen
t P
^Oe
(cu
mu
lati
ve
)r
Rex
cher
t m
ember
of
Ph
osp
ho
ria
form
atio
n to
p no
t ex
pose
d
R-2
2
R-2
1
R-2
0
R-1
9
R-1
8
R-1
7
R-1
6
R-1
5
R-1
4
R-1
3
R-1
2
R-l
l R
-10
R
- 9
R-
8
R-
7 R
- 6
R-
5 R
- 4
R-
3
R-
2 R
- 1
Mud
ston
e,
ph
osp
hat
ic
- - ---
-
Mud
ston
e,
ph
osp
hat
ic --
- ---
-- --
Mud
ston
e an
d ch
ert
-- - -
- - --
f* V
lOT
»t . . ... . . .. ...« ....
I^K
OT
**
, . , .. . .. .. .....
0.8
3
0.0
6
0.0
7.5
3
.0
10.0
18.0
1.8
.9 .5 .9
1.4
1
.0
11.7
.6
5.0
8.0
6.0
7.5
1
.9
3.0
8
.0
0.8
3
0.8
90.8
98.3
10
1.3
111.
3 12
9.3
131.
1 132.0
132.5
133.4
134.8
135.8
147.5
14
8.1
153.
1 16
1.1
167.
1 174.6
176.5
179.5
187.5
Ph
osp
hat
ic s
hal
e m
emb
er o
f P
hosp
hori
a fo
rmat
ion
P-2
7
P-2
6
P-2
5
P-2
4
P-2
3
Sam
ple
s 71
33 t
hro
ugh 7
158
taken
in
ope
n pit
.
Mud
ston
e - - -- - ---
7157
-RA
S
7156
-RA
S
7155
- R
AS
71
54-R
AS
7
153-
RA
S
1.8
3.3
.8
.5
.8
22
.6
.6
4.5
27.3
3.2
31.7
5
0.6
6
9.8
11
.1
60
.5
1.8
5.1
5
.9
6.4
7
.2
40.6
8
42.6
6
46.2
6
59.9
1 6
2.4
7
Sou
th M
ount
ain
Pit
and
Min
e C
on
tin
ued
P-2
2
Mud
ston
e,
carb
on
atic
and
phosp
hat
er
ock
7152
-RA
S
P-2
1
Mu
dst
one,
ca
rbonat
ic
7151
-RA
S
P-2
0
Car
bonat
e rock -----
7150
-RA
S
P-1
9
Mud
ston
e
7149
-RA
S
P-1
8
Mud
ston
e,
carb
on
atic
7148
- R
AS
P-1
7
Mud
ston
e
7147
-RA
SP
-16
C
arb
onat
e ro
ck,
argil
lace
ous -
71
46-R
AS
P-1
5
Mud
ston
e
7145
-RA
SP
-14
M
udst
one
7144
-RA
SP
-13
Mud
ston
e
7143
-RA
S
P-1
2
Mud
ston
e -
- 71
42-R
AS
P-l
l M
udst
one,
ca
rbo
nat
ic --
- -
7141
-RA
SP
-iO
C
arb
onat
e ro
ck,
argil
lace
ous
7140
-RA
SP
- 9
Mud
ston
e,
carb
onat
ic -
---
- 71
39-L
DC
P-
8 C
arb
on
ate
rock
, ar
gil
lace
ous ---
7138
-LD
C
P-
7 P
hosp
hat
e ro
ck,
carb
on
atic
- - --
7137
-LD
CP
- 6
Phosp
hat
e ro
ck,
argil
lace
ous,
ca
rbo
nat
ic
7136
-LD
CP
- 5
Car
bonat
e ro
ck,
argil
lace
ous
- -
7135
-LD
CP
- 4
Mu
dst
one,
phosp
hat
ic,
carb
on
atic
-- -
7134
-LD
CP
- 3
Car
bonat
e ro
ck,
argil
lace
ous,
phosp
hat
ic --
71
33-L
DC
P-
2 C
arbo
nat
e ro
ck,
argil
lace
ous,
phosp
hat
ic
7158
-LD
C
Cover
ed in
terv
al --
----
- -___ ______
Sam
ple
7159
-RA
S t
aken
in
min
e.
P-
1 P
hosp
hat
e ro
ck,
argil
lace
ous
_ _
7159
-RA
S
2.0 1.3
1.6 .8 .5
2.1
1
.6
1.2
1
.1
2.9
2.6
.7
3.2
3
.4
3.0
1.9
1
.0
3.0
2
.2
3.9
4.2
5-1
0?
2.7
13
.67.6
1.2
1.5 .4
3.0
2.2
3.4
3
.8
1.1 .7
2.3
5
.5
5.3
7.5
21.5
13.9
1.5
10
.28
.6
11.6
20.7
33
.338.3
8.0
71
.85
9.7
66
.93
7.2
75
.665.6
84.1
86
.55
1.2
33.7
46.4
25.5
10
.42
7.3
30.7
42.9
28.7
18.8
22
.8
9.2
10
.512
.112.9
13.4
15.5
17.
118.3
19.4
22.3
24.9
25
.62
8.8
32
.23
5.2
37.1
38.1
41.1
43
.34
7.2
51
.4
89
.67
99.5
5101.4
7102.6
7102.8
7
109.1
7112.6
9116.7
7120.9
5124.1
4
125.9
6127.5
7145.1
7163.1
9185.6
9
22
6.5
4240.4
4244.9
4267.3
8300.9
2
**349.6
4
* Not
e in
com
plet
enes
s of
cum
ulat
ive
data
.
INT
.-D
UP
. S
EC
., W
ASH
., D
.C.(
J»2
»
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