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National Geologic Map Database

Geologic Unit: Sprole

Usage:

Sprole Silt (MT*-recognized locally in Roosevelt Co.)


Geologic age:

Quaternary*
Pleistocene*
Wisconsinan*


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

Exposure 2 mi northwest of Sprole, a siding on the Great Northern Railway, in NW/4 SW/4 sec. 3, T. 27 N., R. 51 E., Roosevelt Co., MT. Named from Sprole (Colton, 1963).


AAPG geologic province:

Williston 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 ([ ]).