Usage:
Hico Shale of Cotton Valley Group (LA)
Geologic age:
Jurassic, Late
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 8,130 to 9,330 ft, Southwest Gas Producing Company J. H. Peterson No. 1-V-10 well, in NE/4 NE/4 sec. 25, T. 20 N., R. 4 W., Lincoln Parish, LA (Mann and Thomas, 1964).
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 ([ ]).