Usage:
Lombard Limestone of Snowcrest Range Group (MT*)
Geologic age:
Late Mississippian (Serpukhovian; late Meramecian to late Chesterian)*
Type section, locality, area and/or origin of name:
Type section: exposures 1 km north of Lombard Station, in S/2 sec. 7, T. 4 N., R. 3 E., Toston 7.5-min quadrangle, Broadwater Co., southwestern MT (Wardlaw and Pecora, 1985).
AAPG geologic province:
Montana folded belt*
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 ([ ]).