Halgaito Formation Explained

Halgaito Formation
Type:Formation
Age:Permian
Period:Early Permian
Prilithology:Shale
Namedfor:Halgaito Spring, southwest of Medicine Hat, Navajo Co., AZ (Baker and Reeside, 1929)
Namedby:Baker and Reeside, 1929
Country: United States
Unitof:Cutler Group
Underlies:Elephant Canyon Formation
Overlies:Honaker Trail Formation of the Hermosa Formation[1]
Thickness:350to

The Halgaito Formation is the basal Permian geologic member of the Cutler Group in southern Utah.[2] The member consists of silty sandstone, siltstone and limestone.[3] The Elephant Canyon may grade into the Halgaito and grades northward into the Cedar Mesa Formation.[4]

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]

Notes and References

  1. Web site: Permo-Carboniferous Vertebrate Fossils from the Halgaito Formation, Cutler Group, Southeastern Utah. Scott. Kim M.. Sumida. Stuart S.. 8 November 2004. Denver Annual Meeting. Geological Society of America. 30 September 2018.
  2. Baker. A.A.. Reeside. J.B. Jr.. 1929. Correlation of the Permian of southern Utah, northern Arizona, northwestern New Mexico, and southwestern Colorado. American Association of Petroleum Geologists Bulletin. 13. 11. 1413–1448.
  3. Condon. Steven M.. Zech. Robert S.. 1992. Geologic framework of pre-Cretaceous rocks in the Southern Ute Indian Reservation and adjacent areas, southwestern Colorado and northwestern New Mexico. U.S. Geological Survey Professional Paper. 1505-A, Geology and mineral resources of the Southern Ute Indian Reservation. A1–A56. 10.3133/pp1505A. 30 September 2018. free.
  4. Condon. Steven M.. 1997. Geology of the Pennsylvanian and Permian Cutler Group and Permian Kaibab Limestone in the Paradox Basin, Southeastern Utah and Southwestern Colorado. U.S. Geological Survey Professional Paper. 2000–P, Evolution of sedimentary basins—Paradox Basin. A1–A56. 10.3133/b00P. 30 September 2018. free.
  5. Web site: Halgaito Member of Cutler Formation. Geology of National Parks, 3D and Photographic Tours. United States Geological Survey. 30 September 2018.
  6. Web site: Halgaito Shale/Lower Cutler Formation. Geology of Canyonlands. National Park Service. 30 September 2018.

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