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Late Tertiary extensional basin
Trans-Pecos igneous
Deformed Cretaceous strata
Cretaceous strata
Upper Paleozoic
Lower Paleozoic
Upper Paleozoic flysch
Lower Paleozoic
Precambrian igneous
Precambrian metamorphic
Foreland:
Marathon:
EXPOSED UNITS*TECTONICEPISODE
Tertiary
Laramide
Gulf Coast
Ouachita
Llano
Ts
SUBSURFACE CONTOURS*(elevation in kilometers**)
Caldera
Salt diapirs
Lower Cretaceous reef trend
Normal fault, indicating downthrown side
Thrust fault, teeth on upper plate
Laramide tectonic front
Ouachita tectonic front
Gulf Basin marginQAd8543
OTHER FEATURES
TECTONIC FRONTS
* Note changes in mapped horizon.** >0, elevation greater than sea level;
<-6, depths greater than 6 km below sea level
Tv
L
K
P
CO
O2
O1
pCi
pCm
Top of EllenburgerPaleozoic
0 to -2 -2 to -4>0 -4 to -6 <-6
Top of Precambrian
>0 0 to -2 -2 to -4
Buried Ouachita faciesPaleozoic
Base of Austin Chalk orTop of Edwards Group
Cretaceous>0 0 to -2 -2 to -4 <-4
Top of pre-Tertiary
0 to -1
EL PASO
Ts
P
KTs
DIABLOPLATFORM
KP
Tv
Tv
Ts
0-2
-2-4
DELAWARE BASIN
-4-6
<-6
CENTRAL BASIN PLATFORM
MIDLAND
BASIN
MATADOR ARCH
MIDLAND
-2-4
0-2
BASIN
0-2
-2-4
AMARILLO
>0
>0
AMARILLO
UPLIFT
ANADARKO BASIN-4-6
-2-4
RED RIVER UPLIFT
0-2
>0
0-2
SABI
NE
UPL
IFT
EAST
T
EXAS
B
ASIN
DALLAS
FRO
NT
FORT
WO
RTH BASIN
BEN
D A
RC
H
0-2
LLANOUPLIFT
>0
co
co
>0
-2-4-4-6
SAN ANTONIO
AUSTIN0-2
< -4
TECT
ONI
C
OUACHITA
BALCONES
FAULT
ZON
E-2-4
0-2
DEVILS RIVERUPLIFT
VAL VERDE BASIN
L
O 2
O 1
EDWARDS REEF
SLIGO REEF
HOUSTON
DIAPIR PROVINCEHOUSTON
-2-4
CORPUSCHRISTI
STUART CITY REEF
CUPIDO REEF
RIO GRANDE
EMBAYMENT
0-1
P l ai n
LARAMIDETECTONIC
FRONT
TECTONIC MAP OF TEXAS1997
BUREAU OF ECONOMIC GEOLOGYTHE UNIVERSITY OF TEXAS AT AUSTIN
University Station, Box XAustin, Texas 78713-8924
(512) 471-1534
L
p CipCm
PALO
DURO
GU
LF O
F M
EX ICO
C o a s t al
SAN MARCOS ARCH
HOUSTON
EMBAYMENT
<-4
0
0
50 100 150 200 miles
100 200 300 kilometers
