Usage:
Perham Formation (ME*)
Perham Group (ME)
Geologic age:
Silurian*
Type section, locality, area and/or origin of name:
Type section: on Holster Blackstone Farm in southwest part of Woodland Twp., 1.36 mi north of southern boundary of township, Caribou Co., northeastern ME. Section measured from east to west beginning 140 ft west of road 0.53 mi east of western boundary of Woodland Twp. (Boucot and others, 1964).
AAPG geologic province:
New England province*
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 ([ ]).