NYS Museum NYS Geological Survey Bedrock Attributes version 1.0 , 7-26-1999 .14 Q 1 GLACIAL AND ALLUVIAL DEPOSITS .377 2 COASTAL PLAIN DEPOSITS Km Monmouth Group, Matawan Group and Magothy Formation Kr Raritan Formation .382 3 MESOZOIC INTRUSIVES KJk Kimberlite and alnoite dike and diatreme KJd Lamprophyre, trachyte, ryolite, albite-basalt, and diabase dikes .433 KJtp Trachyte porphyry .394 4 NEWARK GROUP Trhc Hammer Creek Formation Trb Brunswick Formation Trs Stockton Formation Trl Ladentown Diabase Trp Palisade Diabase sill .999 5 POTTSVILLE GROUP Pp Connoquenessing Formation .967 6 POCONO GROUP Mp Cuyahoga Formation .728 7 DEVONIAN INTRUSIVES Dpgr Muscovite-biotite granite Dpgd Muscovite-biotite granondiorite Dbg Muscovite-biotite granite gneiss .728 8 CONEWANGO GROUP Dco Osway Formation .728 9 CONNEAUT GROUP Dct Ellicott Formation .728 10 CANADAWAY GROUP Dcys Northeast Shale Dcyl Westfield Shale Dcyd Gowanda Shale Dcy Machias Formation .728 11 JAVA GROUP Dj Hanover Shale .728 12 WEST FALLS GROUP Dwf Angola Shale Dwn Nunda Formation Dwg West Hill Formation Dwr Lower Beers Hill Dwc Nunda Formation, West Hill Formation Dwrg Gardeau Formation Dwm Beers Hill Shale Dwnm "New Milford" Formation Dwh Honesdale Formation Dws Slide Mountain Formation Dww Upper Walton Formation .728 13 SONYEA GROUP Ds Cashaqua Shale Dsw Lower Walton Formation .728 14 GENESEE GROUP AND TULLY LIMESTONE Dg West River Shale Dgo Oneonta Formation Dgu Unadilla Formation Dt Tully Limestone .739 15 HAMILTON GROUP Dhmo Moscow Formation Dhld Ludlowville Formation Dhsk Skaneateles Formation Dhpm Panther Mountain Formation Dhpl Plattekill Formation Dhmr Marcellus Formation Dhm Undifferentiated Lower Hamilton Group Dh Undifferentiated Hamilton Group .739 16 ONONDAGA LIMESTONE AND TRISTATES GROUP Dob Onondaga Limestone Don Onondaga Limestone Dou Onondaga Limestone Do Oriskany Sandstone Dgl Glenerie Formation .744 17 HELDERBERG GROUP Dhg Port Ewen Formation .744 18 UNDIFFERENTIATED LOWER DEVONIAN AND SILURIAN ROCKS DS Port Ewen thru Manlius Limestone, Rondout Dolostone .755 19 AKRON DOLOSTONE & COBLESKILL LIMESTONE & AND SALINA GROUP Sab Akron Dolostone Scv Camillus Shale Scy Syracuse Formation Scc Cobleskill Limestone Ssy Syracuse Formation Scs Cobleskill Limestone Sv Vernon Formation .755 20 UNDIFFERENTIATED SILURIAN ROCKS I Srp Rondout Formation .755 21 UNDIFFERENTIATED SILURIAN ROCKS II Sbs Bloomsburg Formation .755 22 LOCKPORT GROUP Sl Guelph Dolostone .755 23 CLINTON GROUP Scl Rochester Shale Sr Decew Dolostone Sik Irondequoit Limestone .817 24 MEDINA GROUP AND QUEENSTON FORMATION Sm Thorold Sandstone SmOq Grimsby Formation Oq Queenston Formation .113 25 CORTLANDT AND SMALLER MAFIC COMPLEXES Oban Biotite augite norite Od Diorite with hornblende and/or biotite Ohn Hornblende norite Oh Hornblendite Oopx Olivine pyroxenite Opx Pyroxenite Ogb Gabbro or norite to hornblende diorite .64 26 LORRAINE & TRENTON & BLACK RIVER GROUPS AND METAMORPHIC EQUIVALENTS Oo Oswego Sandstone Oqu Quassaic Quartzite Opw Pulaski Formation Of Frankfort Formation Osc Schenectady Formation Oag Austin Glen Formation Ou Utica Shale Oc Canajoharie Shale On Normanskill Shale Owl Walloomsac Formation Om Manhattan Formation Oi Iberville Shale Osp Stony Point Shale Ocum Cumberland Head Argillite Ot Trenton Group Obr Black River Group Otbr Dolgeville Formation Oba Balmville Limestone Otm Taconic Melange OCs Taconic Melange .64 27 CHAZY GROUP Och Valcour Limestone .75 28 LOWER ORDOVICIAN INTRUSIVE Os Serpentinite .75 29 BEEKMANTOWN & WAPPINGER & STOCKBRIDGE GROUPS & POTSDAM SANDSTONE & POUGHQUAG QUARTZITE & VERMONT VALLEY SEQUENCE AND METAMORPHIC EQUIVALENTS Obk Beekmantown Group Ow Upper Wappinger Group OCth Theresa Formation OCst Stockbridge Marble OCw Wappinger Group OCi Inwood Marble OCs Cambrian thru Middle Ordovician carbonate rock .100 Cbk Beekmantown Group Cth Theresa (Galway) Formation Cw Lower Wappinger Group Cp Potsdam Sandstone Cs Stissing Formation Cwmd Winooski, Monkton and Dunham Dolostone Cc Cheshire Quartzite Ccd Cheshire Quartzite and Dalton Formation Cpg Poughquag Quartzite .139 30 TACONIC OVERTHRUST (ALLOCHTHONOUS) SEQUENCE Ob Bedford Gneiss Ohr Harrison Gneiss Oht Hartland Formation Oag Austin Glen Formation Omi Mount Merino Formation Opl Pillow lava at Stark's Knob near Schuylerville, Saratoga County Op Poultney Formation ("B" and "C" Members) Osf Stuyvesant Falls Formation OCu Undivided Ordovician and Cambrian pelite, quartzite and conglomerate OCe Elizaville Formation .131 Cpw Poultney Formation ("A" Member) Cg Germantown Formation Cm Mettawee Formation Cn Nassau Formation Ca Austerlitz Phyllite Cgt Greenstones and tuffs and/or basalt Cr Rensselaer Graywacke Cev Everett Schist .7 31 METAMORPHIC ROCKS OF SEDIMENTARY AND VOLCANIC ORIGIN f Fordham Gneiss y Yonkers Gneiss pg Poundridge Gneiss .289 32 INTRUSIVE PEGMATITE DIKES p Granite pegmatite dikes, unmetamorphosed .155 33 METAMORPHIC ROCKS OF IGNEOUS ORIGIN gb Olivine metagabbro .69 a metanorthosite and anorthositic gneiss ao Gabbroic metanorthosite and anorthositic gneiss .171 34 METAMORPHIC ROCKS OF SEDIMENTARY ORIGIN (PROBABLY INCLUDES SOME METAVOLCANICS) ADIRONDACKS cs Calcsilicate rock, dolomitic and calcitic marble mb Calcitic and dolomitic marble, variably siliceous mu Undivided metasedimentary rock and related migmatite .790 bqp Biotite-quartz-plagioclase paragneiss, amphibolite, and related migmatite bqpq Biotite-quartz-plagioclase paragneiss, commonly leucocratic garb Quartz-feldspar paragneiss with variable amounts of garnet and sillimanite qt Quartzite, quartz-biotite schist and graphitic schist .171 35 SOUTHEASTERN NEW YORK cs Calcsilicate rock, dolomitic and calcitic marble mb Calcitic and dolomitic marble, variably siliceous .412 bqpc Biotite-quartz-plagioclase paragneiss qtcs Garnet-biotite-quartz-feldspar gneiss qtlg Garnet-bearing paragneiss and interlayered quartzite rg Rusty and gray biotite-quartz-feldspar paragneiss sc Sillimanite-cordierite-almandine-biotite-quartz-feldspar gneiss .845 36 METAMORPHIC ROCKS OF UNCERTAIN ORIGIN ADIRONDACKS qpg Pyroxene-hornblende-quartz-plagioclase gneiss ffg Ferrohedenbergite-fayalite granite and granite gneiss hqs Hornblende-quartz syenite gneiss hs Hornblende syenite gneiss phgs Charnockite, granitic and quartz syenite gneiss phqs Charnockite, mangerite, pyroxene-quartz syenite gneiss ps Mangerite, pyroxene-(hornblende) syenite gneiss .20 am Amphibolite, pyroxenic amphibolite lg Leucogranitic gneiss bg Biotite granite gneiss phg Leucogranite and granite gneiss hbg Biotite and or hornblende granite gneiss hbgo Megacrystic Biotite and or hornblende granite gneiss .845 37 METAMORPHIC ROCKS OF UNCERTAIN ORIGIN SOUTHEASTERN NEW YORK qpg Pyroxene-hornblende-quartz-plagioclase gneiss .20 am Amphibolite, pyroxenic amphibolite lg Leucogranitic gneiss bg Biotite granite gneiss bhg Biotite-hornblende granite and granite gneiss hg Hornblende granite and granite gneiss .808 38 UNDIVIDED AND MIXED GNEISSES ADIRONDACKS amg Interlayered amphibolite and granitic, charnockitic, syenitic gneiss mug Interlayered metasedimentary rock and granitic gneiss ach Hybrid rock: mangeritic to charnockitic gneiss ack Interlayered gabbroic or noritic metanorthosite amu Hybrid rock: metanorthosite and sedimentary rock .808 39 UNDIVIDED AND MIXED GNEISSES SOUTHEASTERN NEW YORK amg Interlayered amphibolite and granitic, charnockitic, syenitic gneiss mug Interlayered metasedimentary rock and granitic gneiss .724 h20 40 water