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National Geologic Map Database

Geologic Unit: Penfield

Usage:

Penfield Dolomite of Lockport Group (NY)
Penfield Member of Lockport Formation (NY)


Geologic age:

late Early to early Late 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).