| State | Colorado |
|---|---|
| Name | Middle Tertiary intrusive rocks |
| Geologic age | Tertiary |
| Lithologic constituents | Major
Igneous > Hypabyssal > Felsic-hypabyssal
Igneous > Hypabyssal > Mafic-hypabyssalintermediate composition
|
| References | Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. |
| NGMDB product | |
| Counties | Alamosa - Archuleta - Chaffee - Clear Creek - Conejos - Costilla - Custer - Delta - Dolores - Eagle - Fremont - Grand - Gunnison - Hinsdale - Huerfano - Jackson - Lake - Larimer - Las Animas - Mesa - Mineral - Montezuma - Ouray - Park - Pitkin - Prowers - Rio Grande - Routt - Saguache - San Juan - San Miguel - Summit - Teller |