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The Valley and range sequence-Southern Yuma County is a 3-Valley sequence of NW–by–SE trending block faulted valleys and mountains. About eleven major mountain ranges connect to each other in four, (mostly parallel), mountain sequences.
Contents
This regional parallel valley-mountain sequence ends at the Gila River valley at the north; to the south, it extends to the Gran Desierto de Altar of northwestern Mexico; the sequence is a remnant of the Basin and Range system.
List of valleys
Table of mountain ranges
The three valleys lay mostly between these perimeter mountain sequences.
References
Valley and range sequence-Southern Yuma County Wikipedia(Text) CC BY-SA