Usage:
Bruggers Sandstone (MI-subsurface)
Geologic age:
Middle Ordovician (Whiterockian)
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 10,152 to 11,322 ft (3,094 to 3,451 m), JEM Bruggers 3-7 well, in sec. 7, T. 24 N., R. 6 W., Missaukee Co., MI (Fisher and Barratt, 1985).
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 ([ ]).