Willwood Formation
Geologic formation in Wyoming, United States / From Wikipedia, the free encyclopedia
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The Willwood Formation is a sedimentary sequence deposited during the late Paleocene to early Eocene, or Clarkforkian, Wasatchian and Bridgerian in the NALMA classification.[1][2]
Quick Facts Type, Sub-units ...
Willwood Formation | |
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Stratigraphic range: Thanetian-Ypresian (Clarkforkian-Bridgerian) ~56–48 Ma | |
Type | Geological formation |
Sub-units | Gray Bull beds, Sand Coulee beds, Sand Creek Facies, Wa-1 Zone |
Lithology | |
Primary | Mudstone, shale |
Other | Sandstone, conglomerate |
Location | |
Coordinates | 44.5°N 108.0°W / 44.5; -108.0 |
Approximate paleocoordinates | 49.2°N 90.8°W / 49.2; -90.8 |
Region | Wyoming |
Country | USA |
Extent | Bighorn Basin |
Type section | |
Named for | Shale, mudstone, limestone |
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