Valley and range sequence-Southern Yuma County
2-representative valleys between Block-faulted mountain ranges-(cross-section).
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.
| West Sequence North |
W-Central block | E-Central block | East Sequence North |
|---|---|---|---|
| Gila River Valley | Gila River Valley | Gila River Valley | Gila River Valley |
| Gila Mountains (Yuma County) | Wellton Hills and Baker Peaks |
Mohawk Mountains | Aztec Hills |
| Gila Mountains (Yuma County) | Copper Mountains | Mohawk Mountains | Aguila Mountains |
| Tinajas Altas Mountains and Butler Mountains) |
W:Cabeza Prieta and Tule Mountains E:Sierra Pinta |
Bryan Mountains and Antelope Hills |
Granite Mountains (Arizona) |
| Tinajas Altas Mountains and Butler Mountains) |
W:Cabeza Prieta and Tule Mountains E:Sierra Pinta |
Bryan Mountains and Antelope Hills |
xxxxxx |
| West Sequence South |
W-Central block | E-Central block | East Sequence South |
See also
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
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