Usage:
Ellsworth Shale (IN*,MI*)
Ellsworth Member of New Albany Shale (IN)
Subunits:
MEMBER STATUS (alphabetical) --all in IN: Falling Run Bed, Henryville Bed, Jacobs Chapel Bed.
Geologic age:
Late Devonian to Early Mississippian (Famennian to Kinderhookian)*
Type section, locality, area and/or origin of name:
Type locality: Petoskey Portland Cement Company quarry, about 1.5 mi south of Ellsworth, in NE/4 NE/4 sec. 26, T. 32 N., R. 8 W., Banks Twp., Antrim Co., south-central MI (Newcombe, 1932; 1933).
AAPG geologic province:
Illinois basin*
Michigan 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 ([ ]).