The University of Texas at Dallas Main article: Transportation in Houston, Houston East Texas outcrops consist of Cretaceous and Paleogene sediments which contain important deposits of Eocene lignite the Mississippian and Pennsylvanian sediments in the north; Permian sediments in the west; and Cretaceous sediments in the east along the Gulf coast and out on the Texas continental shelf contain oil Oligocene volcanic rocks are found in far west Texas in the Big Bend area a blanket of Miocene sediments known as the Ogallala formation in the western high plains region is an important aquifer. Located far from an active plate tectonic boundary Texas has no volcanoes and few earthquakes. . .
. The early isolation of the region and its links to the Deep South have resulted in its well-known pine woods being described as a 'curtain' that demarcates a certain cultural enclave or bubble that distinguishes East Texas from the rest of the state Former residents describe leaving behind the 'Pine Curtain' as a form of escape, Houston Texas Business Directory (16) 63 Small single-story structure with pitched roof a center door is flanked by a window on each side Wide stairs lead to a wide front porch with wood railing. .
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