Usage:
Detroit River Group (MI*,OH*)
Detroit River Formation of Muscatatuck Group (IN)
Subunits:
GROUP STATUS: Amherstburg Formation (MI*,OH*), Anderdon Formation/Limestone (MI,OH), Lucas Formation (MI*,OH*), Sylvania Sandstone (MI,OH).
FORMATION STATUS: Cranberry Marsh Member (IN), Grover Ditch Member (IN), Milan Center Dolomite Member (IN).
Geologic age:
Middle Devonian*
Type section, locality, area and/or origin of name:
[Type area:] exposures along Detroit River, MI (Lane and others, 1909).
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 ([ ]).