Williams Fork Formation

Williams Fork Formation
Stratigraphic range: Campanian (Edmontonian)
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TypeGeological formation
Unit ofMesaverde Group
Lithology
PrimaryMudstone
OtherSandstone
Location
Coordinates40°00′N 108°48′W / 40.0°N 108.8°W / 40.0; -108.8
Approximate paleocoordinates47°30′N 80°18′W / 47.5°N 80.3°W / 47.5; -80.3
RegionColorado
CountryUnited States
Williams Fork Formation (the United States)
Williams Fork Formation (Colorado)

The Williams Fork Formation (WFF) is a geologic formation located in northwestern Colorado that is a member of the Mesaverde group. The formation was located on the eastern coast of Laramidia and was deposited by a fluvio-deltaic environment during the Campanian/Maastrichtian (Edmontonian) boundry.

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