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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).