| State | Colorado |
|---|---|
| Name | Quartzite, conglomerate, and interlayered mica schist |
| Geologic age | Early Proterozoic |
| Lithologic constituents |
Major
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Sedimentary > Clastic > Conglomerate
Minor
Metamorphic > Schist > Mica-schist
|
| References | Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. |
| NGMDB product | |
| Counties | Boulder - Costilla - Fremont - Hinsdale - Jefferson - La Plata |