Ancient alluvium

In isolated patches that may not all be of the same age
State Colorado
Name Ancient alluvium
Geologic age Quaternary-Tertiary
Lithologic constituents
Unconsolidated (Alluvial)ancient alluvium

Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.

NGMDB product
Counties Delta - Eagle - Garfield - Gunnison - Mesa - Pitkin