Bonham Marl (TX*)
Bonham Clay of Austin Group (TX)
Named from exposures a short distance north of town of Bonham, Fannin Co., TX, and for fact that town, especially the part north of railroad, is located on the clay (Stephenson, 1927).
Ouachita folded belt*
South Oklahoma 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 ([ ]).