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Absaroka Volcanic Supergroup: Sunlight Group

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Including Trout Peak Trachyandesite, Wapiti Formation (andesitic volcaniclastic rocks), Crescent Hill Basalt, and Mount Wallace Formation (felsic and mafic volcaniclastic rocks).
State Wyoming
Name Absaroka Volcanic Supergroup: Sunlight Group
Geologic age Eocene
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Basalt
Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic)
Minor
Igneous > Volcanic > Mafic-volcanictrachyandesite
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
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Counties Park