Usage:
Maywood Formation (MT*,WY*)
Geologic age:
late Middle to early Late Devonian (Givetian to Frasnian)*
Type section, locality, area and/or origin of name:
Named from Maywood Ridge, west of Princeton, on whose northeastern face, 2 mi above mouth of South Boulder Creek, the best exposure occurs, [in T. 8 N., R. 13 W., Philipsburg quadrangle, Granite Co.], central western MT (Emmons and Calkins, 1913).
AAPG geologic province:
Montana folded belt*
Sweetgrass arch*
Yellowstone 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 ([ ]).