Sylvania Formation (MI*)
Sylvania Sandstone (MI*,OH*)
Sylvania Sandstone of Detroit River Group (MI,OH)
Sylvania Sandstone Member of Amherstburg Formation (MI*)
Middle Devonian*
Sylvania, Lucas Co., OH (Orton, 1888).
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 ([ ]).