Brownstown Marl (AR*,LA*,OK*)
Brownstown Marl of Austin Group (TX*)
Brownstown Formation (OK*)
Brownstown Formation of Austin Group (LA,TX)
Late Cretaceous (Campanian)*
First described in vicinity of Brownstown, Sevier Co., AR (Hill, 1888; 1894; 1901).
"The village of Brownstown, Sevier County, Arkansas, is located on top of Brownstown marl as thus restricted by Stephenson and Dane" (see GNC remarks, Wilmarth, 1938, p. 276).
Ouachita folded belt*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"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 ([ ]).