Permian etc of Marathon Texas. Extracts from Geol. of Texas Bull. 44, 1916 (1) " " " " " " VERDIA 1753, 1917. (2) The south-eastern portion of Texas, south to the Great Bend, of the Rio Grande, is known as the Cordillera Pro- vince, the most easterly region of this ext. area. It is also called the Colorado Plateau Province that extends from here westward into California. Here is the highest point in Texas, in El Capitan, 8690 feet above the sea. The Rio Grande level is 1500 feet, Sierra Mountains are just to the east of the Front Range. They (1) and other mts are the vanishing structures of the Front Ridge. The mts of the Trans Pecos were made "in the Pleiocene or (1) Pleistocene" (13) The next older deformation is that of the Ouachita Mts of the Late Pennsylvanian. It is said to have folded the earlier Penn., and over these folds lies the latest Penn. and the Penn. Over all these lies the Comanchian (13) Another time of deformation was "near the close of the Upper Cretaceous, and a fourth near the close of the Paleogene" (13). The Rio Grande was in existence early in Eocene time (21). (1) The Pecos came in with the Pleistocene (22) Ouachita deformation. The strata "were pressed together in numerous (1) close sharp folds" (106) "beneath which eroded and were outwashed herewith, the sea in late Penn. time" (106)