Cutler Formation: Difference between revisions

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(based on edited USGS PD text)
 
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The '''Cutler''' is a rock unit that is spread across the [[U.S. states]] of [[Arizona]], northwest [[New Mexico]], southeast [[Utah]] and southwest [[Colorado]]. It was laid down in the [[Early Permian]] during the [[Wolfcampian]] stage. In Arizona and Utah it is often called athe [[group'''Cutler (geology)|group]]Group''' but the preferred [[USGS]] nomenclaturename classifiesis it'''Cutler as a [[formation (geology)|formation]]Formation''''.<ref>[http://ngmdb.usgs.gov/Geolex/NewUnits/unit_7824.html GEOLEX database entry for 'Cutler'] Accessed 18 March 2006</ref> Its subunits, therefore, are variously called formations or [[member (geology)|member]]s depending on the publication. This article will use the national standard set by the USGS. Members (oldest to youngest [age sorting needs to be checked]):
*Elephant Canyon (Utah)
*Halgaito (Arizona, Colorado, New Mexico, Utah)
*De Chelly Sandstone (Arizona, Colorado, New Mexico, Utah)
 
There is no desigated [[type locality]] for the Cutler.It was named by Cross and Howe in 1905 after Cutler Creek, which enters [[Uncompahgre River]] about 4 miles north of [[Ouray, Colorado]]. Baker and Reeside revised Cross and Howe's work in 1929 by dividing the formation into the Halgaito Tongue (base), Cedar Mesa Sandstone Member, Organ Rock Tongue, and White Rim Sandstone Member. Cutler's geographic extent was established by Wood and Northrop in 1946. In 1958 Wengerd and Matheny raised the formation to [[group (geology)|group]] rank, but [[as of 2005]] the USGS does not currently recognize the suggested change.
 
Cutler outcrops are found in these geologic locations: