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Map showing publication footprint
  • Usage in publication:
    • Bearwallow Mountain Formation
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Basalt
    • Latite
    • Andesite
  • AAPG geologic province:
    • Basin-and-Range province
Publication:

Elston, W.E., 1968, Terminology and distribution of ash-flows of the Mogollon-Silver City-Lordsburg region, New Mexico, IN Titley, S.R., ed., Southern Arizona guidebook III: Arizona Geological Society Guidebook, p. 231-240.


Summary:

Pg. 234. Bearwallow Mountain Formation. Basalt, latite, basaltic andesite. Thickness 300 m. Overlies Double Springs Andesite, Railroad Canyon Rhyolite, or Wall Lake Latite. Intertongues with John Kerr Peak Quartz Latite and Jordan Canyon Rhyolite. Intruded by Pelona Latite. Age is Miocene.
Type locality: Bearwallow Mountain, Catron Co., Mogollon Mountains, southwestern NM.

Source: US geologic names lexicon (USGS Bull. 1520, p. 22).


Map showing publication footprint
  • Usage in publication:
    • Bearwallow Mountain Andesite*
  • Modifications:
    • Redescribed
    • Revised
    • Geochronologic dating
  • Dominant lithology:
    • Andesite
  • AAPG geologic province:
    • Basin-and-Range province
Publication:

Marvin, R.F., Naeser, C.W., Bikerman, Michael, Mehnert, H.H., and Ratte, J.C., 1987, Isotopic ages of post-Paleocene igneous rocks within and bordering the Clifton 1 degree x 2 degrees quadrangle, Arizona-New Mexico: New Mexico Bureau of Mines and Mineral Resources Bulletin, no. 118, 64 p.


Summary:

Bearwallow Mountain Formation redescribed as Bearwallow Mountain Andesite. Limited to predominately calc-alkalic andesites and basaltic andesite eruptives and intrusives that formed low profile cones or small shield volcanoes that range from 23 to 27 m.y., or Miocene and Oligocene. Includes: 1) andesites at Bearwallow Mountain, Negrito Mountain, O Bar O Mountain, Pelona Mountain, Black Mountain, Brushy Mountain, Wilson Mountain, Keller Canyon, Rose Peak; 2) porphyritic andesites at Burnt Stump Canyon, Hamilton Spring, and Cold Spring Mountain; 3) intrusive andesite at Tillie Hall Canyon. Younger (less than 21-22 m.y.) intermediate to silicic rocks not related to Bearwallow Mountain. Andesitic volcanoes are excluded. Occurs in Catron and Grant Cos, NM in the Basin-and-Range province.

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

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