Usage:
Welling Formation of Viola Group (OK)
Geologic age:
Late Ordovician (Cincinnatian; Edenian to Maysvillian)
Type section, locality, area and/or origin of name:
Type locality: in NE/4 NE/4 sec. 36, T. 16 N., R. 22 E., Cherokee Co., OK. Named from the town of Welling, near the type locality at Horseshoe Bend of the Illinois River, Cherokee Co., OK (Amsden, 1979).
Reference section (subsurface): in OGS 3 core, in SE/4 SE/4 NE/4 sec. 20, T. 13 N., R. 21 E., Sequoyah Co., OK (Amsden, 1979).
AAPG geologic province:
Arkoma basin
Chautauqua platform
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 ([ ]).