Usage:
Hemlock Lake Formation of Saginaw Group (MI)
Subunits:
Six Lakes Member (MI).
Geologic age:
Pennsylvanian, Early
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 770 to 1,000 ft, Michigan Consolidated Gas Co. No. L-125 well, in center NW/4 NW/4 sec. 29, T. 18 N., R. 5 W., Lincoln Twp., Clare Co., MI. Named from nearby Hemlock Lake (Vugrinovich, 1984).
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 ([ ]).