Usage:
Beverly Tongue of Henry Formation of Mason Group (IL*-subsurface)
Geologic age:
Pleistocene (Wisconsinan Age)*
Type section, locality, area and/or origin of name:
Type section: Beverly sand and gravel pit, a large pit about 2 mi (3.3 km) east of IL Highway 25 and I-90 intersection northeast of Elgin, in Kane and Cook Cos., northeastern IL (Hansel and Johnson, 1996).
AAPG geologic province:
Michigan basin*
Wisconsin arch*
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 ([ ]).