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National Geologic Map Database

Geologic Unit: East Mountain

Usage:

East Mountain Shale Member of Mineral Wells Formation of Strawn Group (TX*)
East Mountain Shale of Strawn Group (TX)
East Mountain Formation of Lone Camp Group (TX)


Subunits:

FORMATION STATUS (alphabetical) --all in TX: Hog Mountain Sandstone Bed or Hog Mountain Sandstone Member, Village Bend Member.


Geologic age:

Middle Pennsylvanian (Desmoinesian)*


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

[Not designated.] Named from exposures in high escarpment east of town of Mineral Wells, Palo Pinto Co., north-central TX (Plummer and Moore, 1922).
Type locality: the extensive exposure on south end of East Mountain in Mineral Wells (Plummer and Hornberger, 1936).


AAPG geologic province:

Bend arch*


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 ([ ]).