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National Geologic Map Database

Geologic Unit: Bayou Calamus

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).