Willwood Formation

Willwood Formation
Stratigraphic range: Thanetian-Ypresian (Clarkforkian-Bridgerian)
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TypeGeological formation
Sub-unitsGray Bull beds, Sand Coulee beds, Sand Creek Facies, Wa-1 Zone
Lithology
PrimaryMudstone, shale
OtherSandstone, conglomerate
Location
Coordinates44°30′N 108°00′W / 44.5°N 108.0°W / 44.5; -108.0
Approximate paleocoordinates49°12′N 90°48′W / 49.2°N 90.8°W / 49.2; -90.8
RegionWyoming
CountryUnited States
ExtentBighorn Basin
Type section
Named forShale, mudstone, limestone
Willwood Formation (the United States)
Willwood Formation (Wyoming)

The Willwood Formation is a sedimentary sequence deposited during the late Paleocene to early Eocene, or Clarkforkian, Wasatchian and Bridgerian in the NALMA classification.

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