Anza-Borrego Desert State Park
Paleontology            Photo by Ernie Cowan - Anza Borrego Photography Institute
                                               
                                                                                
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3.5 MYA CO RIVER DELTA

The Setting
The Current Environment
The Animals
The Fossils
In this paleolandscape, artist John Francis depicts the river delta created by the Colorado River.


 



For a more detailed description of the history of paleontology and geology in the Anza-Borrego State Park see,  "Fossil Treasures of the Anza Borrego Desert", George T  Jefferson and Lowell Lindsay, editors, Sunbelt Publications, San Diego California, 2006.		   

The Setting                                                    

Lush, watery floodplain

Dense hardwood forest

20+ inches of rain annually

Vast deltaic depositional apron spread across the Salton Trough at the northern end of the Gulf of California
 

Current Environment

Borrego's Colorado River Delta, as it appears today.

 

 
The Animals              


1. Geese (Anser sp.)
2. Killdeer (Charadruis vociferous)
3. Pliocene horse, extinct (Dinohippus sp.)
4. Razorback sucker (Xyrauchen texanus)
5. Garter snake (Thamnophis sp.)
6. Gomphothere proboscidean, extinct (Gomphotherium sp.)
7. Fan Palm (Washingtonia sp.)
The Fossils
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