Valley and range sequence-Southern Yuma County

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.

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

• Coyote Wash and Lechuguilla Desert
• Mohawk Valley (Arizona)
• San Cristobal Valley

Table of mountain ranges

The three valleys lay mostly between these perimeter mountain sequences.

See also

• Fault-block mountain

External links

• U.S. Bureau of Reclamation: Map of "Surface geology of the Lower Colorado River Planning Area" – Southwestern Arizona.
• ADWR – Arizona Dept of Water Resources: Lower Colorado River Hydrology – with map