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National Geologic Map Database

Geologic Unit: McNulty

Usage:

McNulty Rhyolite (CO)
Also called McNulty Gulch Rhyolite.


Geologic age:

early Tertiary (Eocene)


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

Named from occurrence in one large and several small bodies at head of McNulty Gulch, which runs north and enters Tenmile River at Carbonateville, Tenmile district, Summit Co., western central CO (Cross, 1886; see also Emmons, 1898).


AAPG geologic province:

Eagle 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).