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National Geologic Map Database

Geologic Unit: Stump

Usage:

Stump Formation (CO*,ID*,UT*,WY*)


Subunits:

(alphabetical): Curtis Member (CO*,ID*,UT*,WY*), Redwater Member (CO*,ID*,UT*,WY*).


Geologic age:

late Middle to early Late Jurassic (middle Callovian to Oxfordian)*


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

Not designated. Named from Stump Peak, at head of north fork of Stump Creek, about center T. 6 S., R. 45 E., Caribou Co., ID (Mansfield and Roundy, 1916).


AAPG geologic province:

Green River basin*
Snake River basin*
Uinta uplift*
Wasatch uplift*
Yellowstone province*


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 ([ ]).