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National Geologic Map Database

Geologic Unit: Cook Mountain

Usage:

Cook Mountain Formation of Claiborne Group (AR*,KY*,LA*,MS*,MO*,TN*,TX*)


Subunits:

(alphabetical): Archusa Marl Member (MS*), Crossroads Lentil (LA), Dodson Member (LA), Falcon Sandstone Member (TX), Garceno Sandstone Member (TX), Gordon Creek Shale Member (MS*), Landrum Member (TX), Little Brazos Limestone Lentil (TX), Little Natches Member (LA), Lufkin Member (TX), Mahon Glauconite Lentil (LA), Milams Member (LA,TX), Mount Tabor Shale Member (TX), Potterchitto Member (MS*), Saline Bayou Member (LA,TX), Shipps Creek Shale Member (MS), Spiller Sand Member (TX), Veleno Member (TX), Wheelock Marl Member (TX).


Geologic age:

early Tertiary (middle Eocene)*


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

Named from Cook Mountain, Houston Co., eastern TX (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Arkla basin*
Black Warrior basin*
East Texas basin*
Gulf Coast basin*
Mid-Gulf Coast basin*
Upper Mississippi embayment*


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 ([ ]).