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National Geologic Map Database
Geologic Unit: Cuchara
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Map showing publication footprint
  • Usage in publication:
    • Cuchara formation*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Las Vegas-Raton basin
Publication:

Johnson, R.B., and Wood, G.H., Jr., 1956, Stratigraphy of Upper Cretaceous and Tertiary rocks of Raton basin, Colorado and New Mexico: American Association of Petroleum Geologists Bulletin, v. 40, no. 4, p. 701-721. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Crops out in trough of Raton basin part of the Las Vegas-Raton basin south of Spanish Peaks and extends to northern part of Huerfano Park. Is at least 5,000 ft thick in the center of the basin. Is a massive red, pink, and white sandstone which may be conglomeratic and well-consolidated, interbedded with red, gray, and tan claystone and red shale with lenses of green shale. Was a piedmont and floodplain deposit probably derived from underlying Poison Canyon Formation.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Cuchara Formation*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Las Vegas-Raton basin
Publication:

Scott, G.R., and Taylor, R.B., 1975, Post-Paleocene Tertiary rocks and Quaternary volcanic ash of the Wet Mountain Valley, Colorado: U.S. Geological Survey Professional Paper, 868, 15 p., (incl. geologic map, scale 1:250,000)


Summary:

Consists largely of yellowish-gray conglomerate, sandstone, and mudstone derived from both sedimentary and crystalline rocks, an intimate mixture of Huerfano and Farisita lithologies. Abandonment of name suggested [but not formally stated]. Mapped with Huerfano and Farisita in Huerfano Park, in Huerfano Co, CO in the Las Vegas-Raton basin. Assigned an Eocene age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).