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

Geologic units in Columbia county, New York

Briarcliff Dolostone and Pine Plains Formation (Cambrian) at surface, covers 2 % of this area

Briarcliff Dolostone and Pine Plains Formation - Columbia County: Pine Plains-dolostone, oolite, shale.

Lithology: dolostone (dolomite); shale

Everett Schist (Cambrian?) at surface, covers 2 % of this area

Everett Schist - minor meta-graywacke lenses. Includes Greylock Schist in Massachusetts.

Lithology: schist; metasedimentary rock

Normanskill Shale (Middle Ordovician) at surface, covers 0.9 % of this area

Normanskill Shale - minor mudstone, sandstone.

Lithology: shale; mudstone; sandstone

Taconic Melange (Middle Ordovician) at surface, covers 0.8 % of this area

Taconic Melange - chaotic mixture of Early Cambrian thru Middle Ordovician pebble to block-size clasts in a pelitic matrix of Middle Ordovician (Barneveld) age. Rims and floors earlier submarine gravity slides of Taconian Orogeny.

Lithology: melange

Rensselaer Graywacke (Cambrian? ) at surface, covers 0.8 % of this area

Rensselaer Graywacke - minor shale.

Lithology: graywacke; shale

Balmville Limestone (Middle Ordovician) at surface, covers 0.8 % of this area

Balmville Limestone - Vermont: Whipple Limestone.

Lithology: limestone

Copake and Halcyon Lake Formations, Rochdale Limestone (Lower Ordovician) at surface, covers 0.5 % of this area

Copake and Halcyon Lake Formations, Rochdale Limestone - Columbia County: Copake Formation-limestone, dolostone; Halcyon Lake Formation-chert, calc-dolostone.

Lithology: limestone; dolostone (dolomite); chert

Walloomsac Formation (Middle Ordovician) at surface, covers 26 % of this area

Walloomsac Formation - slate, phyllite, schist, metagraywacke.

Lithology: slate; phyllite; schist; metasedimentary rock

Mount Merino and Indian River Formations (Ordovician) at surface, covers 7 % of this area

Mount Merino and Indian River Formations - shale, slate, cherts.

Lithology: shale; slate; chert

Nassau Formation (Cambrian ?) at surface, covers 8 % of this area

Nassau Formation - south of 43 degrees; slate, shale, thin quartzite, includes Stuyvesant Conglomerate, Diamond Rock Quartzite, Curtis Mountain Quartzite, and Bomoseen Graywacke Members.

Lithology: shale; quartzite; slate; conglomerate; graywacke

Stissing Formation (Cambrian) at surface, covers < 0.1 % of this area

Stissing Formation - dolostone, shale.

Lithology: dolostone (dolomite); shale

Austin Glen Formation (Pawlet in Vermont) (Middle Ordovician) at surface, covers 6 % of this area

Austin Glen Formation (Pawlet in Vermont) - graywacke, shale.

Lithology: graywacke; shale

Germantown Formation (Cambrian) at surface, covers 8 % of this area

Germantown Formation - south of Troy; shale, conglomerate, limestone.

Lithology: shale; conglomerate; limestone

Elizaville Formation (Cambrian - Ordovician) at surface, covers 13 % of this area

Elizaville Formation - shale, argillite, quartzite.

Lithology: shale; argillite; quartzite

Stockbridge Formation (Cambrian - Lower Ordovician) at surface, covers 2 % of this area

Stockbridge Formation - calcitic and dolomitic marble.

Lithology: marble

Onondaga Limestone (Lower to Middle Devonian) at surface, covers < 0.1 % of this area

Onondaga Limestone - Schoharie Formation-shale, limestone; Carlisle Center Siltstone; Esopus Shale.

Lithology: shale; limestone; siltstone

Cheshire Quartzite and Dalton Formation (Cambrian) at surface, covers < 0.1 % of this area

Cheshire Quartzite and Dalton Formation

Lithology: quartzite; gneiss; schist; conglomerate

Cambrian thru Middle Ordovician carbonate rock (Cambrian - Middle Ordovician) at surface, covers 0.5 % of this area

Cambrian thru Middle Ordovician (Barneveld) carbonate rock - occuring as slivers caught along thrusts of later allochthones, or carbonate blocks in Taconic Melange.

Lithology: carbonate; melange

Greenstones and tuffs and/or basalt (Cambrian?) at surface, covers 0.2 % of this area

Greenstones and tuffs and/or basalt

Lithology: greenstone; tuff; basalt

Austerlitz Phyllite (Cambrian?) at surface, covers 5 % of this area

Austerlitz Phyllite - minor quartzite

Lithology: phyllite; quartzite

Glacial and Alluvial Deposits (Quaternary) at surface, covers 4 % of this area

Glacial and Alluvial Deposits - underlying bedrock geology unknown.

Lithology: alluvium; glacial drift

Helderberg Group (Lower Devonian) at surface, covers 0.3 % of this area

Helderberg Group - West of Albany: Alsen, Becraft, New Scotland, Kalkberg, Coeymans, and Manlius Limestones; Rondout Dolostone. South of Albany: Port Ewen, Alsen thru Manlius Limestones; Rondout Dolostone.

Lithology: limestone; dolostone (dolomite)

Stuyvesant Falls Formation (Ordovician) at surface, covers 7 % of this area

Stuyvesant Falls Formation - south of Troy; shale, siltstone.

Lithology: shale; siltstone