Usage:
Jacobsville Sandstone of Keweenawan Supergroup (MI*,WI*)
Jacobsville Sandstone (OH*-subsurface)
Geologic age:
Mesoproterozoic*
Type section, locality, area and/or origin of name:
Exposures near town of Jacobsville on Keweenaw Peninsula, Houghton Co., Northern Peninsula, northwestern MI (Lane and Seaman, 1907).
AAPG geologic province:
Lake Superior region*
Wisconsin arch*
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 ([ ]).