No current usage.
(†Winslow Formation (AR,OK) replaced with Atoka Formation, Hartshorne Formation, McAlester Formation, Savanna Formation, and Boggy Formation. See Atoka, Hartshorne, McAlester, Savanna, and Boggy.)
Pennsylvanian
Named from exposures at and around Winslow, [Washington Co.], northwestern AR (US geologic names lexicons, USGS Bull. 896, 1200).
Arkoma basin
Chautauqua platform
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 ([ ]).