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Carmel Formation

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Type  Geological formation
Named for  Mount Carmel
Underlies  Entrada Sandstone
Country  US
Primary  Mudstone
Unit of  San Rafael Group
Carmel Formation sedutaheduCarmel201JPG
Thickness  From 200 feet (60 m) to 1,000 feet (300 m)
Other  Sandstone, siltstone, limestone
Region  Wyoming, Utah, Colorado, north east Arizona and New Mexico

Jurassic carmel formation the rocks of utah


The Carmel Formation is a geologic formation in the San Rafael Group that is spread across the US states of Wyoming, Utah, Colorado, north east Arizona and New Mexico. Part of the Colorado Plateau, this formation was laid down in the Middle Jurassic during the late Bajocian, through the Bathonian and into the early Callovian stages.

Contents

Carmel formation mp4


Subunits

Members (alphabetical):

  • Co-op Creek Limestone Member (UT),
  • Crystal Creek Member (UT),
  • Homestake Limestone Member (UT*),
  • Judd Hollow Member (AZ*,UT*) or Judd Hollow Tongue (AZ*,UT*),
  • Kolob Limestone Member (UT), [name violates the 1983 North American Stratigraphic Code]
  • Paria River Member (UT*),
  • Wiggler Wash Member (UT*),
  • Winsor Member (UT*).
  • (Asterisks mean the name is used by the US Geological Survey).

    History of investigation

    In 1928 Gilluly and Reeside stated an intent to name the formation after Mount Carmel but did not give a type locality. They noted it as a basal formation in the San Rafael Group in San Rafael Swell, in Emery County, Utah. An overview along with a type locality and source of name was stated by Gregory and Moore in 1931. Mackin revised the formation's description and assigned the Homestake Limestone Member to it in 1954. Harshbarger and others created an overview in 1957. Its eastern areal limits were described by Wright and others in 1962. In 1963, western areal limits along with an overview were completed by Schultz and Wright. Another revision was done by Phoenix in 1963 who also added a Judd Hollow Tongue member. Isotopic dating was conducted by Marvin and others in 1965. The Kolob, Crystal Creek, Paria River, Winsor, and Wiggler Wash members were assigned by Thompson and Stokes in 1970. Areal limits were adjusted by O'Sullivan and Craig in 1973 and again in 1983 by Blakey and others. An overview was completed by Chapman in 1989. Hintze and others conducted isotopic dating and created an overview in 1994.

    Paleontological finds

    There have been a number of paleontological finds within the Carmel Formation. Among these have been bryozoans, oysters, as well as dinosaur foot prints.

    Bryozoans

    There have been a number of bryozoans found within the Carmel Formation. These finds include seven species of calcareous cyclostome bryozoans as well as a soft-bodied ctenosome bryozoan.

    Places found

    Geologic Province:

  • Black Mesa Basin*
  • Capitol Reef National Park
  • Great Basin province*
  • Green River Basin*
  • Paradox Basin*
  • Plateau sedimentary province*
  • San Juan Basin
  • Uinta Basin*
  • Uinta Uplift*
  • References

    Carmel Formation Wikipedia


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