Usage:
Penfield Dolomite of Lockport Group (NY)
Penfield Member of Lockport Formation (NY)
Geologic age:
Silurian (Wenlock to Ludlow)
Type section, locality, area and/or origin of name:
Type section: in Dolomite Products Company quarry, north of Whalen Road, 1 mi north-northwest of the four corners in village of Penfield (W 1/9 Macedon quadrangle), west-central NY (Zenger, 1962).
AAPG geologic province:
Appalachian 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 ([ ]).