Usage:
No current usage.
(†Ouachita Shale (AR) is same as Mazarn Shale, Blakely Sandstone, and lower part of Womble Shale. See Mazarn, Blakely, and Womble.)
Geologic age:
Early to Middle Ordovician
Type section, locality, area and/or origin of name:
Named from Ouachita Mountains, southwestern AR, the pronunciation of which is Washita (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Ouachita folded belt
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 ([ ]).