The First 40Ar/39Ar Ages and Tephrochronologic Framework for the Jurassic Entrada Sandstone in central Utah
The first 40Ar/39Ar ages of the Middle Jurassic Entrada Sandstone were derived from tephra beds found in central Utah. Eight air fall ash beds in the Entrada Sandstone, with 40Ar/39Ar biotite ages ranging from 168.1 ± 0.2 to 160.8 ± 0.2 Ma, help to establish the age of Entrada deposition. They were...
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| Format: | Others |
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BYU ScholarsArchive
2014
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| Online Access: | https://scholarsarchive.byu.edu/etd/5315 https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6314&context=etd |