Usage:
Bayou Calamus Lentil of Verda Member of Yazoo Clay of Jackson Group (LA)
Geologic age:
early Tertiary (late Eocene)
Type section, locality, area and/or origin of name:
Typical exposures occur in erosion gully 75 yds east of road in SW/4 NW/4 sec. 24, T. 12 N., R. 4 E., Caldwell Parish. Named from exposures in ravines at head of Bayou Calamus, central LA (Humer, 1939).
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 ([ ]).