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Mafic intrusive rocks

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Sierra Madre--Gabbro of Elkhorn Mountain; age 1,800 Ma. Medicine Bow Mountains--Mullen Creek 5 and Lake Owens 7 Mafic Complexes; older than 1,700 Ma.
State Wyoming
Name Mafic intrusive rocks
Geologic age Early Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Gabbroicmafic
References

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.

https://pubs.er.usgs.gov/publication/70046739
NGMDB product
Counties Albany - Carbon