Usage:
Schuler Formation of Cotton Valley Group (subsurface of AL*,AR*,LA*,MS*,TX*)
Subunits:
(alphabetical): Bodcaw Tongue (LA), Davis Tongue (LA), Dorcheat Member (AR*,LA*,MS,TX*), Shongaloo Member (AR*,LA*,MS?,TX*), Vaughn Tongue (LA).
Geologic age:
Jurassic, Late*
Type section, locality, area and/or origin of name:
Type section (subsurface; nearshore facies): depth-interval 5,385 to 7,475 ft (Dorcheat 5,385 to 6,445 ft; Shongaloo 6,445 to 7,475 ft), Lion Oil Refining Company, and Phillips Petroleum Company's Edna Morgan No. 1 well, in center NE/4 SW/4 sec. 18, T. 18 S., R. 17 W., Union Co., AR (Swain, 1944).
Type locality: Schuler oil field, Union Co., AR (Shearer, 1938).
Reference sections (subsurface): (1) depth-interval 5,035 to 6,360 ft, McAlester Fuel Company Hervey A-1 well; (2) depth-interval 8,307 to 9,966 ft, Carter Crystal-Whited well 1 (Dickinson, 1968).
AAPG geologic province:
Arkla basin*
East Texas 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 ([ ]).