| State | Colorado |
|---|---|
| Name | Eocene prevolcanic sedimentary rocks |
| Geologic age | Tertiary |
| Lithologic constituents |
Major
Sedimentary > Clastic > Sandstone > Arkose
Unconsolidated > Coarse-detrital > Gravelbouldery gravel
Minor
Sedimentary > Clastic > Conglomerate
Sedimentary > Clastic > Mudstone (Arkosic)
Sedimentary > Clastic > Sandstone
|
| References | Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. |
| NGMDB product | |
| Counties | Archuleta - Conejos - Custer - Dolores - Fremont - Gunnison - Hinsdale - Mineral - Montrose - Ouray - Park - San Juan - San Miguel - Teller |