Usage:
Cockfield Formation of Claiborne Group (AL*,AR*,KY*,LA*,MS*,MO*,TN*,TX)
Cockfield Formation of Yegua Group (TX)
Originally called Cocksfield Ferry Beds.
Subunits:
(alphabetical): Creola Member (LA,MS), Kilpatrick Lentil (LA), Sugar Creek Lentil (LA).
Geologic age:
early Tertiary (middle Eocene)*
Type section, locality, area and/or origin of name:
Named from Cockfield Ferry (correct spelling), on Red River, near Petite Ecore, Winn [Parish], northwestern LA (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Arkla basin*
Gulf Coast basin
Mid-Gulf Coast 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).