Usage:
Floyds Knob Bed of Grainger Formation (KY,TN)
Floyds Knob Bed of Muldraugh Member of Borden Formation (IN*,KY*)
Floyds Knob Bed of New Providence Shale Member of Fort Payne Formation (KY*)
Floyds Knob Formation of Borden Group (IN*,KY*)
Floyds Knob Member of Edwardsville Formation (IN)
Floyds Knob Member of Muldraugh Formation (IN)
Geologic age:
Middle Mississippian (Visean; Osagean)*
Type section, locality, area and/or origin of name:
Exposures along U.S. Highway 150 through the Knobstone Escarpment at Floyds Knob, in center sec. 21, T. 2 S., R. 6 E. Named from Floyds Knob, 0.75 mi east of post office of same name, 3 mi northwest of New Albany, Clark Co., IN (Stockdale, 1931b).
AAPG geologic province:
Cincinnati arch*
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 ([ ]).