Carmel Formation
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The Carmel Formation is a geologic formation in the San Rafael Group that is spread across the U.S. 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 early Callovian, through the Bathonian and into the late Bajocian stages.[1]
Asterisks (*) below indicate usage by the U.S. Geological Survey.
Contents |
[edit] Subunits
Members (alphabetical):[2]
- 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 usage violates the 1983 North American Stratigraphic Code][3]
- Paria River Member (UT*),
- Wiggler Wash Member (UT*),
- Winsor Member (UT*).
[edit] 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 (new) 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 assiged 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.[4]
[edit] Places found
Geologic Province:[5]
- Black Mesa Basin*
- Great Basin province*
- Green River Basin*
- Paradox Basin*
- Plateau sedimentary province*
- San Juan Basin
- Uinta Basin*
- Uinta Uplift*
[edit] References
- ^ GEOLEX database
- ^ GEOLEX database
- ^ GEOLEX database
- ^ For the whole section, except where noted: GEOLEX database: Summary of Citation
- ^ GEOLEX database
[edit] External links
- GEOLEX database entry for Carmel, USGS (viewed 20 March 2006)
- GEOLEX database: Summary of Citations for Carmel, USGS (viewed 20 March 2006)
