| State | Colorado |
|---|---|
| Name | Alkalic and mafic rocks in small plutons, and diabase and gabbro dikes |
| Geologic age | Middle Proterozoic |
| Lithologic constituents |
Major
Igneous > Hypabyssal > Mafic-hypabyssal (Diabase)diabase
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-mafic-alkaline
Incidental
Igneous > Plutonic > Dioritic (Dike or sill, Diabase)diabase
Igneous > Plutonic > Gabbroic > Gabbro (Dike or sill)
|
| References | Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. |
| NGMDB product | |
| Counties | Gunnison - Hinsdale - La Plata |