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National Geologic Map Database

Geologic Unit: Bloomington

Usage:

Bloomington Formation (ID*,UT*)


Subunits:

(alphabetical): Calls Fort Shale Member (UT*), Hodges Shale Member (ID*,UT*).


Geologic age:

Middle Cambrian*


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

Type locality: about 6 mi west of Bloomington, Bear Lake Co., southeastern ID. Bloomington Creek, near type locality, passes through formation (Walcott, 1908).


AAPG geologic province:

Central Western Overthrust*
Great Basin province*
Snake River basin*
Wasatch uplift*


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 ([ ]).