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National Geologic Map Database

Geologic Unit: Pease River

Usage:

Pease River Group (TX*)


Subunits:

(alphabetical) --all in TX: Blaine Formation*, Dog Creek Shale*, Flower-pot Shale*, San Angelo Formation or San Angelo Sandstone*.


Geologic age:

Early Permian (Cisuralian; Leonardian)*


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

"Type exposures" are along the Pease River, Hardeman and Cottle Cos., TX. Origin of name not stated by authors, but probably named from Pease River (described in "At Home and Abroad" section of AAPG Bull., v. 23, no. 5, p. 76 [or 764?], 1939, by several geologists on field trip, H.C. Fountain, leader).


AAPG geologic province:

Anadarko basin*
Bend arch*
Permian basin*
Palo Duro basin*
South Oklahoma folded belt*


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 ([ ]).