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Geologic units in Ulster county, New York

Rondout Formation (Upper Silurian) at surface, covers 0.7 % of this area
Rondout Formation - dolostone, limestone; Binnewater Sandstone; High Falls Shale; Warwarsing Limestone; Decker Limestone; Bossardville Limestone; Poxono Island Formation-shale, dolostone.
Lithology: siltstone; limestone; sandstone; dolostone (dolomite); shale
Bloomsburg Formation (Upper Silurian) at surface, covers 5 % of this area
Bloomsburg Formation - shale, sandstone; Guymard Quartzite; Otisville Shale; Shawangunk Conglomerate-sandstone, conglomerate.
Lithology: shale; sandstone; quartzite; conglomerate
Quassaic Quartzite (Upper Ordovician) at surface, covers 2 % of this area
Quassaic Quartzite - quartzite, sandstone, conglomerate.
Lithology: quartzite; sandstone; conglomerate
Normanskill Shale (Middle Ordovician) at surface, covers < 0.1 % of this area
Normanskill Shale - minor mudstone, sandstone.
Lithology: shale; mudstone; sandstone
Mount Merino and Indian River Formations (Ordovician) at surface, covers 0.2 % of this area
Mount Merino and Indian River Formations - shale, slate, cherts.
Lithology: shale; slate; chert
Wappinger Group (Cambrian - Lower Ordovician) at surface, covers < 0.1 % of this area
Wappinger Group - (including Fishkill limestone and dolostone): Copake Formation ?-limestone, dolostone; Rochdale Formation-limestone, dolostone; Halcyon Lake Dolostone-locally cherty; Briarcliff Dolostone; Pine Plains Formation-dolostone, shale, oolite; Stissing Formation-dolostone, shale.
Lithology: limestone; dolostone (dolomite); shale; chert
Austin Glen Formation (Pawlet in Vermont) (Middle Ordovician) at surface, covers 19 % of this area
Austin Glen Formation (Pawlet in Vermont) - graywacke, shale.
Lithology: graywacke; shale
Upper Walton Formation (Upper Devonian) at surface, covers 0.9 % of this area
Upper Walton Formation - shale, sandstone, conglomerate.
Lithology: shale; sandstone; conglomerate
Slide Mountain Formation (Upper Devonian) at surface, covers 1 % of this area
Slide Mountain Formation - sandstone, shale, conglomerate.
Lithology: sandstone; shale; conglomerate
Honesdale Formation (Upper Devonian) at surface, covers 1 % of this area
Honesdale Formation - sandstone, shale.
Lithology: sandstone; shale
Lower Walton Formation (Upper Devonian) at surface, covers 0.2 % of this area
Lower Walton Formation - shale, sandstone, conglomerate.
Lithology: shale; sandstone; conglomerate
Undifferentiated Lower Devonian and Silurian rocks (Lower Devonian - Silurian) at surface, covers 1 % of this area
Undifferentiated Lower Devonian and Silurian rocks - in northern Ulster County: Port Ewen thru Manlius Limestones; Rondout Dolostone; Binnewater Sandstone; High Falls Shale. In Orange County: Kanhouse Sandstone; Woodbury Creek Formation-shale, sandstone; Esopus Shale; Connelly Conglomerate; Central Valley Sandstone; New Scotland Limestone thru Rondout Dolostone; Decker Limestone; Poxono Island Formation-shale, dolostone; Longwood Shale; Green Pond Conglomerate.
Lithology: limestone; dolostone (dolomite); sandstone; shale; conglomerate
Onondaga Limestone (Lower to Middle Devonian) at surface, covers 4 % of this area
Onondaga Limestone - Schoharie Formation-shale, limestone; Carlisle Center Siltstone; Esopus Shale.
Lithology: shale; limestone; siltstone
Plattekill and Ashokan Formations (Middle Devonian) at surface, covers 9 % of this area
Plattekill Formation - shale, sandstone; Ashokan Formation-shale, sandstone.
Lithology: shale; sandstone
Moscow Formation (Middle Devonian) at surface, covers 2 % of this area
Moscow Formation - in west: Cooperstown and Portland Point shale and sandstone Members; In east: "Manorkill" and Portland Point shale and sandstone Members.
Lithology: shale; sandstone
Undifferentiated Lower Hamilton Group (Middle Devonian) at surface, covers 5 % of this area
Undifferentiated Lower Hamilton Group - Panther Mountain, Mount Marion, Stony Hollow, and Union Springs shales and sandstones.
Lithology: shale; sandstone; limestone
Helderberg Group (Lower Devonian) at surface, covers 0.1 % 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)
Undifferentiated Hamilton Group (Middle Devonian) at surface, covers 1 % of this area
Undifferentiated Hamilton Group - shale, siltstone. In eastern Orange County: Skunnemunk Formation-sandstone, conglomerate; Bellvale Formation-shale, sandstone; Cornwall Shale.
Lithology: shale; siltstone; sandstone; conglomerate
Oneonta Formation (Middle - Upper Devonian) at surface, covers < 0.1 % of this area
Oneonta Formation - shale, sandstone, conglomerate.
Lithology: shale; sandstone; conglomerate
Glenerie Formation (Lower Devonian) at surface, covers 0.4 % of this area
Glenerie Formation - limestone, chert.
Lithology: limestone; chert; shale; conglomerate

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