Usage:
Bonham Marl (TX*)
Bonham Clay of Austin Group (TX)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
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).
AAPG geologic province:
Ouachita folded belt*
South Oklahoma 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 ([ ]).