| | pg 004: Geology of the Marathon region, Texas Publication 6445288 |
 | | These intermontane areas are either bolsons (structural depressions filled by mountain waste) or destructional plains that slope upward as pediments toward the mountain masses from which they have been carved. |
 | | The intermontane plains are mostly depressed areas filled by waste carried down from the mountains. |
 | | Similar parallel mountain ranges and intermontane lowlands are present southwest of the Quitman and Eagle Mountains, on the Mexican side of the Rio Grande, where they extend from the vicinity of El Paso southeastward past the great bend of the river and on into the interior of the State of Chihuahua (pl. 22, fig. |
| www.lib.utexas.edu /books/landscapes/publications/txu-oclc-6445288/txu-oclc-6445288-b-004-print.html (938 words) |