No current usage.
(†Black Prairie Series (AR,TX) abandoned. Is same as Gulfian Provincial Series. See Gulfian.)
Late Cretaceous (Gulfian Provincial Epoch)
Named from Black Prairie of eastern TX and AR defined by R.T. Hill in Amer. Jour. Sci., 3rd ser., v. 33, p. 294, 1887.
Arkla basin
East Texas basin
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 ([ ]).