The Provenance of Eocene Tuff Beds in the Fossil Butte Member of the Green River Formation of Wyoming: Relation to the Absaroka and Challis Volcanic Fields
The Green River Formation was deposited between 53.5 and 48.5 Ma. The Angelo, Fossil Butte, and Lower members of the Green River Formation at Fossil Basin, preserve ash fall tuffs deposited in ancient Fossil Lake. 40Ar/39Ar dating of sanidine yielded eruptive ages of 51.29 ± 1.29 Ma and 52.20 ± 3.08...
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| Format: | Others |
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BYU ScholarsArchive
2006
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| Online Access: | https://scholarsarchive.byu.edu/etd/753 https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1752&context=etd |