Usage:
Amsterdam Limestone of Black River Group (NY*)
[?] Amsterdam Member of Isle La Motte Limestone of Black River Group (NY,VT)
Geologic age:
Late Ordovician (Mohawkian; Turinian)*
Type section, locality, area and/or origin of name:
Type locality: in quarry 0.5 mi east of Manny Corners, 3 mi east-northeast of Amsterdam, [Amsterdam 7.5-min quadrangle], Montgomery Co., eastern NY (Kay, 1937).
Named from exposures along the Mohawk River in vicinity of Amsterdam, [Amsterdam 7.5-min quadrangle], Montgomery Co., eastern NY (Cushing, 1911).
AAPG geologic province:
Appalachian basin*
New England 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 ([ ]).