Halgaito Formation

The Halgaito Formation is the basal Permian geologic member of the Cutler Group in southern Utah.^[3] The member consists of silty sandstone, siltstone and limestone.^[1] The Elephant Canyon may grade into the Halgaito and grades northward into the Cedar Mesa Formation.^[4]

Halgaito Formation
Stratigraphic range: Permian
Type	Formation
Unit of	Cutler Group[1]
Underlies	Elephant Canyon Formation
Overlies	Honaker Trail Formation of the Hermosa Formation[2]
Thickness	350 to 800 feet (110 to 240 m)[1]
Lithology
Primary	Shale
Location
Country	United States
Type section
Named for	Halgaito Spring, southwest of Medicine Hat, Navajo Co., AZ (Baker and Reeside, 1929)[3]
Named by	Baker and Reeside, 1929[3]

Extent

There is no designated type locality for the Halgaito.^[5] The shale can be seen at the confluence of the Green River and Colorado Rivers and in Cataract Canyon.^[6]