Bluff Formation

Bluff Formation
Stratigraphic range: late Jurassic
Bluff Formation at its type area, Bluff, Utah, US
TypeFormation
Unit ofSan Rafael Group
UnderliesMorrison Formation
OverliesSummerville Formation
Thickness350 ft (110 m)
Lithology
PrimarySandstone
OtherMudstone
Location
Coordinates37°17′21″N 109°33′06″W / 37.2893°N 109.5518°W / 37.2893; -109.5518
RegionFour Corners
Country United States
Type section
Named forBluff, Utah
Named byBaker, Dane, and Reeside
Year defined1936
Bluff Formation is located in the United States
Bluff Formation
Bluff Formation (the United States)
Bluff Formation is located in Utah
Bluff Formation
Bluff Formation (Utah)

The Bluff Formation is a geological formation found in the Four Corners area. It was deposited in the late Jurassic Period.