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Map showing publication footprint
  • Usage in publication:
    • Osier Mountain welded tuff member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Rhyolite
  • AAPG geologic province:
    • San Juan basin
Publication:

Muehlberger, W.R., Adams, G.E., Longgood, T.E., Jr., and St. John, B.E., 1960, Stratigraphy of the Chama quadrangle, northern Rio Arriba County, New Mexico, IN Beaumont, E.C., and Read, C.B., eds., Guidebook of the Rio Chama Country [New Mexico and Colorado]: New Mexico Geological Society Field Conference Guidebook, no. 11, p. 93-102.


Summary:

Pg. 100, 101. Osier Mountain welded tuff member of Treasure Mountain rhyolite. Name credited to E.L. Trice (unpub. thesis). Rhyolite near quartz latite in composition. Light-gray to medium-light-gray at top; grades to pale red at base. Thickness 54 feet. Overlies Lagunitas clastic member (new). Age is late Miocene.
Type locality not stated. Crops out in Chama area, northern Rio Arriba Co., northwestern NM.

Source: US geologic names lexicon (USGS Bull. 1200, p. 2864).


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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