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National Geologic Map Database

Geologic Unit: Espy

Usage:

Espy Tongue of Haystack Mountains Formation of Mesaverde Group (WY*)
Espy Tongue of Steele Shale (WY*)


Geologic age:

Late Cretaceous (Campanian)*


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

Not designated. Named from exposures near Espy Ranch, in sec. 18, T. 19 N., R. 88 W., Carbon Co., WY (Hale, 1961).


AAPG geologic province:

Green 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).