Usage:
Blocher Member of New Albany Shale (IN*,KY)
Blocher Shale Member of New Albany Shale of Knobs Group (IL-southern part)
Geologic age:
late Middle to early Late Devonian (Givetian to Frasnian)*
Type section, locality, area and/or origin of name:
Type section: exposures on Highway 50, 1.5 mi southeast of Blocher and 1 mi east of Baltimore and Ohio RR, Scott Co., IN (Campbell, 1946).
AAPG geologic province:
Cincinnati arch*
Illinois basin*
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 ([ ]).