U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Valentine

Usage:

Valentine Formation of Ogallala Group (NE,SD)


Subunits:

(alphabetical): Brown County Bed (NE-local), Burge Member (NE, SD), Cornell Dam Member (NE), Crookston Bridge Member (NE,SD), Devils Gulch Member (NE,SD).


Geologic age:

late Tertiary (Miocene; Barstovian NALMA)


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

Type locality: on south side of drainage cut between old and new railroad grades, in NE/4 sec. 17, T. 33 N., R. 27 W., Cherry Co., central northern NE. Named from town of Valentine in Cherry Co., central northern NE (Johnson, 1936).


AAPG geologic province:

Chadron arch
Salina basin


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).