The Southwestern Historical Quarterly, Volume 50, July 1946 - April, 1947 Page: 16
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Southwestern Historical Quarterly
individual, not a governmental, industry in which initiative
and private enterprise will continue to make available to all
the oil, gas, and allied products upon which the progress of
the world so largely depends.
Structure and Stratigraphy
The structure and stratigraphy of Texas are of direct inter-
est to the oil industry, for it is the attitude and physical char-
acteristics of the strata that play so important a part in the
discovery and production of oil and gas.
There is no single broad classification for the structure of
Texas. It varies greatly from one region to another, and there
is, in many parts of the state, a considerable variation between
the surface and the subsurface structures. Such variations
include not only changes in the rate and direction of dip
between the surface and subsurface formations but also such
structural anomalies as buried hills and intrusives below the
surface. Excellent illustrations of such variations are to be
found in the variations in dip between the surface and sub-
surface formations on the flanks of the Bend Arch, in the
buried granite ridge of the Red River Uplift, in the serpentine
plugs of the Balcones Fault zone, and in the salt domes of
coastal and eastern Texas.
A classification of the regional structural provinces includes:
(a) the general gulfward dipping monocline with its inward
limit bounded roughly by a line from northeastern Montague
County to Burnet County and thence westward to Brewster
County; (b) the Llano Uplift in the central portion of the
state where early igneous, pre-Cambrian, and Ordovician rocks
are exposed at the surface; (c) the Van Horn, Marathon, and
Solitario Uplift areas of extreme western Texas where forma-
tions are exposed varying in age from Paleozoic, or earlier, to
the present; (d) the Bend Arch extending northward from the
Llano Uplift to southern Archer County, with surface exposures
of Pennsylvanian and some Cretaceous formations; (e) the
Red River Uplift where earlier formations are covered by
strata of Permian, Pennsylvanian, and Cretaceous ages; (f)
the Amarillo Uplift with its granite ridge buried beneath Per-
mian, Triassic, and recent formations; and (g) the West Texas
Basin where surface strata varying in age from recent to
Triassic overlay successively older formations.
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Texas State Historical Association. The Southwestern Historical Quarterly, Volume 50, July 1946 - April, 1947, periodical, 1947; Austin, Texas. (texashistory.unt.edu/ark:/67531/metapth101117/m1/32/: accessed January 24, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting Texas State Historical Association.