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National Geologic Map Database

Geologic Unit: Osier Mountain

Usage:

Osier Mountain Welded Tuff Member of Treasure Mountain Rhyolite (NM)


Geologic age:

early Tertiary (early Oligocene; Rupelian)


Type section, locality, area and/or origin of name:

Type locality not stated. Crops out in Chama area, northern Rio Arriba Co., northwestern NM (Muehlberger and others, 1960; name credited to E.L. Trice, unpub. thesis).


AAPG geologic province:

San Juan basin


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 ([ ]).