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National Geologic Map Database

Geologic Unit: Crossen

Usage:

Crossen Trachyte (TX-local)
Crossen Trachyte of Buck Hill Group (TX-local)
Recognized in southwestern TX, notably Crossen Mesa north of Green Valley.


Geologic age:

Tertiary
Eocene


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

Named for fact that it caps Crossen Mesa in north-central part of Buck Hill quadrangle, Brewster Co., TX (Goldich and Elms, 1946; 1949).


AAPG geologic province:

Permian 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 ([ ]).