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National Geologic Map Database

Geologic Unit: Little Flat

Usage:

Little Flat Formation of Chesterfield Range Group (ID*,UT*)


Subunits:

Delle Phosphatic Member (ID*,UT*).


Geologic age:

Mississippian, Early*
Osagean*
Mississippian, Late*
Meramecian*


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

Type section: measured on southwest-trending spur in NW/4 sec. 29, T. 7 S., R. 40 E., to base of series of prominent cliffs, approx. 100 ft. below crest of Chesterfield Range, Bannock Co., ID. Named from Little Flat Canyon in Chesterfield Range (Dutro and Sando, 1963).


AAPG geologic province:

Snake 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).