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] |
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]
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]