Pulaski and Whetstone Gulf Formations

Siltstone, shale.
State New York
Name Pulaski and Whetstone Gulf Formations
Geologic age Upper Ordovician
Lithologic constituents
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Mudstone > Shale
Comments part of Lorraine, Trenton, and Black River Groups up to 1600 ft. (490 m). Secondary unit description from USGS website (ref. NY046) and reference NY035: Pulaski Formation of Late Ordovician age (Cincinnatian, Maysvillian to early Richmondian) is used in report. Nautiloid taxa of Maysvillian to early Richmondian strata on OH [Bull Fork Formation according to fig. 2] are also characteristic of "Lorraine fauna" of Foerste (1914). This fauna also is found in coeval Pulaski Formation in NY and Georgian Bay Formation in southern Ontario (Frey, 1995).
NGMDB product
Counties Jefferson - Lewis - Oneida - Oswego