Usage:
Morgan sand (informal) in Cotton Valley Formation (AR)
Informal. The rank or lithologic term should not be capitalized.
Geologic age:
Jurassic, Late
Type section, locality, area and/or origin of name:
Not designated. Named from the Lion Oil Refining Co. and Phillips Petroleum Co. Edna Morgan A-1 in the Schuler pool, Union Co., AR (Weeks, 1938).
AAPG geologic province:
Arkla 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 ([ ]).