Intrusive rocks

Alkalic and mafic intrusive rocks in small plutons, and diabase dikes
State Colorado
Name Intrusive rocks
Geologic age Cambrian
Lithologic constituents
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-mafic-alkaline (Diabase)diabase
Igneous > Plutonic > Dioritic > Diorite (Diabase)diabase

Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.

NGMDB product
Counties Custer - Fremont - Gunnison