| State | Colorado |
|---|---|
| Name | Upper Tertiary intrusive rocks |
| Geologic age | Tertiary |
| Lithologic constituents | Major
Igneous > Hypabyssal > Mafic-hypabyssalintermediate
Igneous > Hypabyssal > Felsic-hypabyssalfelsite
|
| References | Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. |
| NGMDB product | |
| Counties | Dolores - Grand - Gunnison - Jackson - La Plata - Moffat - Routt - San Juan |