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National Geologic Map Database
Geologic Unit: Peralta
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Map showing publication footprint
  • Usage in publication:
    • Peralta Tuff Member*
  • Modifications:
    • Principal reference
  • Dominant lithology:
    • Tuff
  • AAPG geologic province:
    • San Juan basin
Publication:

Bailey, R.A., Smith, R.L., and Ross, C.S., 1969, Stratigraphic nomenclature of volcanic rocks in the Jemez Mountains, New Mexico, IN Contributions to stratigraphy, 1968: U.S. Geological Survey Bulletin, 1274-P, p. P1-P19.


Summary:

P8. Peralta Tuff Member of Bearhead Rhyolite of Keres Group. Consists predominantly of bedded air-fall tuffs but includes probable hot-avalanche deposits, as well as reworked tuffs that are interbedded with and grade laterally into volcanic gravels of the Cochiti Formation. [Age is middle Pliocene.]
Named from typical exposures in Peralta Canyon near its junction with Colle Canyon [in area of Canada de Cochiti Grant-Santa Fe National Forest bdry., Santo Domingo Pueblo 15-min quadrangle, Sandoval Co., north-central NM].

Source: Publication.


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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).