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National Geologic Map Database

Geologic Unit: Split Rock

Usage:

Split Rock Formation (WY*)


Geologic age:

Tertiary
Miocene


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

Not designated. Named from Split Rock, a cloven granite peak in the Granite Mountains, in sec. 18, T. 29 N., R. 89 W., Natrona Co., central WY (Love, 1961).


AAPG geologic province:

Wind River 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 ([ ]).