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National Geologic Map Database

Geologic Unit: Lockport

Usage:

Lockport Dolomite (NY*,KY,OH*,PA*,WV)
Lockport Dolomite of Hunton Group (KY,PA,MI)
Lockport Dolomite of Niagara Group (MI)
Lockport Formation (NY*)
Lockport Group (NY*,OH)


Subunits:

GROUP STATUS: Gasport (NY*,OH), Goat Island (NY*,OH), Eramosa (NY*), Guelph (NY*,OH) Oak Orchard (NY), Penfield (NY), Sconondoa (NY), Ilion (NY) Formations.
FORMATION STATUS: Decew (NY,PA), Gasport (NY), Goat Island (NY), Eramosa (NY), Oak Orchard (NY), Penfield (NY), Sconondoa (NY), Ilion (NY) Members.


Geologic age:

late Early to early Late Silurian (Wenlock to Ludlow)*


Type section, locality, area and/or origin of name:

Named from exposures at Lockport, Niagara Co., NY (Hall, 1839).


AAPG geologic province:

Appalachian basin*
Michigan 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 ([ ]).