Usage:
No current usage.
(†Bony Falls Member of Black River Formation (MI) or †Bony Falls Formation (MI) considered obsolete. Is same as Black River Formation. See Black River.)
Geologic age:
Late Ordovician
Type section, locality, area and/or origin of name:
Type locality: at Bony Falls on Escanaba River, in sec. 1, T. 41 N., R. 24 W., Delta Co., northern MI (Hussey, 1952).
AAPG geologic province:
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 ([ ]).