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Mineral Resources > Online Spatial Data > Geology > by state > New York Geology

Geologic units in Niagara county, New York

Ilion Shale (Upper Silurian) at surface, covers 26 % of this area

Ilion Shale

Lithology: black shale

Decew Dolostone and Rochester Shale (Lower Silurian) at surface, covers 1 % of this area

Decew Dolostone and Rochester Shale

Lithology: shale; dolostone (dolomite); black shale; calcarenite

Beekmantown Group (in part) (Lower Ordovician) at surface, covers 0.3 % of this area

Beekmantown Group (in part) - In St. Lawrence Valley: Ogdensburg Dolostone (Beauharnois Dolostone in Canada); In Champlain Valley: Providence Island Dolostone; Fort Cassin Formation-limestone, dolostone; Fort Ann Formation (Spellman of Clinton and Essex Counties)-limestone, dolostone; Cutting Formation-dolostone (locally cherty), limestone, siltstone. In Vermont: includes Bridport, Bascom, Cutting, and Shelburne carbonates.

Lithology: dolostone (dolomite); limestone; chert; siltstone

Medina Group (Lower Silurian) at surface, covers 3 % of this area

Medina Group - consists of: Thorold Sandstone; Grimsby Formation-sandstone, shale; Power Glen and Cabot Head Shales; Whirlpool Sandstone.

Lithology: sandstone; shale

Camillus, Syracuse, and Vernon Formations (Upper Silurian) at surface, covers 16 % of this area

Camillus, Syracuse, and Vernon Formations - shale, dolostone, salt, and gypsum.

Lithology: shale; dolostone (dolomite); evaporite; black shale

Queenston Shale (Upper Ordovician) at surface, covers 52 % of this area

Queenston Shale

Lithology: shale

Irondequoit Limestone thru Kodak Sandstone (Lower Silurian) at surface, covers 2 % of this area

Irondequoit Limestone thru Kodak Sandstone - includes: Irondequoit Limestone, Rockway Dolostone, Hickory Corners Limestone, Neahga Shale, and Kodak Sandstone.

Lithology: sandstone; shale; limestone; dolostone (dolomite); chert; phosphate