| Ca: Austerlitz Phyllite (Cambrian?) |
| Cbk: Beekmantown Group (Cambrian) |
| Ccd: Cheshire Quartzite and Dalton Formation (Cambrian) |
| Cev: Everett Schist (Cambrian?) |
| Cg: Germantown Formation (Cambrian) |
| Cgt: Greenstones and tuffs and/or basalt (Cambrian) |
| Cm: Mettawee Slate (Cambrian?) |
| Cn: Nassau Formation (Cambrian ?) |
| Cp: Potsdam Sandstone (Cambrian) |
| Cpg: Poughquag Quartzite (Cambrian) |
| Cpw: Poultney Formation ("A" Member) (Cambrian) |
| Cr: Rensselaer Graywacke (Cambrian? ) |
| Cs: Stissing Formation (Cambrian) |
| Cth: Theresa (Galway) Formation (Cambrian) |
| Cw: Briarcliff Dolostone and Pine Plains Formation (Cambrian) |
| DS: Undifferentiated Lower Devonian and Silurian rocks (Lower Devonian - Silurian) |
| Dco: Oswayo and Venango Formations (Upper Devonian) |
| Dct: Conneaut Group, undivided (Upper Devonian) |
| Dcy: Machias Formation (Upper Devonian) |
| Dcyd: Gowanda, South Wales, and Dunkirk Shales (Upper Devonian) |
| Dcyl: Westfield Shale and Laona Siltstone (Upper Devonian) |
| Dcys: Northeast Shale and Shumla Siltstone (Upper Devonian) |
| Dg: Genesee Group (Upper Devonian) |
| Dgl: Glenerie Formation (Lower Devonian) |
| Dgo: Oneonta Formation (Middle - Upper Devonian) |
| Dgu: Unadilla, Laurens, New Lisbon, and Gilboa Formations (Middle Devonian) |
| Dh: Undifferentiated Hamilton Group (Middle Devonian) |
| Dhg: Helderberg Group (Lower Devonian) |
| Dhld: Ludlowville Formation (Middle Devonian) |
| Dhm: Undifferentiated Lower Hamilton Group (Middle Devonian) |
| Dhmo: Moscow Formation (Middle Devonian) |
| Dhmr: Marcellus Formation (Middle Devonian) |
| Dhpl: Plattekill and Ashokan Formations (Middle Devonian) |
| Dhpm: Panther Mountain Formation (Middle Devonian) |
| Dhsk: Skaneateles Formation (Middle Devonian) |
| Dj: Wiscoy Formation (Upper Devonian) |
| Do: Oriskany Formation (Lower Devonian) |
| Dob: Onondaga and Bois Blanc Limestones (Middle Devonian) |
| Don: Onondaga Limestone (Middle Devonian) |
| Dou: Onondaga Limestone (Lower to Middle Devonian) |
| Dpgd: Muscovite-biotite granodiorite (Upper Devonian) |
| Dpgr: Muscovite-biotite granite (Upper Devonian) |
| Ds: "Enfield" and Kattel Formations (Upper Devonian) |
| Dsw: Lower Walton Formation (Upper Devonian) |
| Dt: Tully Limestone (Middle Devonian) |
| Dwc: Nunda Formation, West Hill Formation (Upper Devonian) |
| Dwf: Angola and Rhinestreet Shales (Upper Devonian) |
| Dwg: West Hill and Gardeau Formations (Upper Devonian) |
| Dwh: Honesdale Formation (Upper Devonian) |
| Dwm: Beers Hill, Dunn Hill, Millport, and Moreland Shales (Upper Devonian) |
| Dwn: Nunda Formation (Upper Devonian) |
| Dwnm: New Milford Formation (Upper Devonian) |
| Dwr: Lower Beers Hill Shale (Upper Devonian) |
| Dwrg: Gardeau Formation (Upper Devonian) |
| Dws: Slide Mountain Formation (Upper Devonian) |
| Dww: Upper Walton Formation (Upper Devonian) |
| KJd: Lamprophyre, trachyte, and rhyolite dikes (Jurassic - Lower Cretaceous) |
| KJk: Kimberlite and alnoite dikes and diatremes (Jurassic - Lower Cretaceous) |
| KJtp: Trachyte porphyry (Jurassic - Lower Cretaceous) |
| Km: Monmouth Group, Matawan Group and Magothy Formation (Upper Cretaceous) |
| Kr: Raritan Formation (Upper Cretaceous) |
| Mp: Cuyahoga and Knapp Formations (Lower Mississippian) |
| OCe: Elizaville Formation (Cambrian - Ordovician) |
| OCi: Inwood Marble (Early Cambrian - Lower Ordovician) |
| OCs: Cambrian thru Middle Ordovician carbonate rock (Cambrian - Middle Ordovician) |
| OCst: Stockbridge Formation (Cambrian - Lower Ordovician) |
| OCth: Theresa Formation (Cambrian - Lower Ordovician) |
| OCu: Undifferentiated Middle Ordovician thru Lower Cambrian allochthonous rocks (Cambrian - Ordovician) |
| OCw: Wappinger Group (Cambrian - Lower Ordovician) |
| Oag: Austin Glen Formation (Pawlet in Vermont) (Middle Ordovician) |
| Ob: Bedford Gneiss (Ordovician?) |
| Oba: Balmville Limestone (Middle Ordovician) |
| Oban: Biotite augite norite (Upper Ordovician) |
| Obk: Beekmantown Group (in part) (Lower Ordovician) |
| Obr: Black River Group (Middle Ordovician) |
| Oc: Canajoharie Shale (Middle Ordovician) |
| Och: Valcour, Crown Point, and Day Point Limestones (Middle Ordovician) |
| Ocum: Cumberland Head Argillite (Middle Ordovician) |
| Od: Diorite with hornblende and/or biotite (Upper Ordovician) |
| Of: Frankfort Formation (Upper Ordovician) |
| Ogb: Gabbro or norite to hornblende diorite (Upper Ordovician) |
| Oh: Hornblendite (Upper Ordovician) |
| Ohn: Hornblende norite (Upper Ordovician) |
| Ohr: Harrison/Ravenswood Gneiss (Ordovician?) |
| Oht: Hartland Formation (Ordovician?) |
| Om: Manhattan Formation, undivided (Ordovician?) |
| Oma: Manhattan Formation (A Member) (Middle Ordovician) |
| Omi: Mount Merino and Indian River Formations (Ordovician) |
| On: Normanskill Shale (Middle Ordovician) |
| Oo: Oswego Sandstone (Upper Ordovician) |
| Oopx: Olivine pyroxenite (Upper Ordovician) |
| Op: Poultney Formation ("B" and "C" Members) (Ordovician) |
| Opl: Pillow lava (Ordovician) |
| Opw: Pulaski and Whetstone Gulf Formations (Upper Ordovician) |
| Opx: Pyroxenite (Upper Ordovician) |
| Oq: Queenston Shale (Upper Ordovician) |
| Oqu: Quassaic Quartzite (Upper Ordovician) |
| Os: Serpentinite (Lower Ordovician) |
| Osc: Schenectady Formation (Upper Ordovician) |
| Osf: Stuyvesant Falls Formation (Ordovician) |
| Osp: Stony Point Shale (Middle Ordovician) |
| Ot: Trenton Group (Middle Ordovician) |
| Otbr: Trenton and Black River Groups, undivided (Middle Ordovician) |
| Otm: Taconic Melange (Middle Ordovician) |
| Ou: Utica Shale (Middle Ordovician) |
| Ow: Copake and Halcyon Lake Formations, Rochdale Limestone (Lower Ordovician) |
| Owl: Walloomsac Formation (Middle Ordovician) |
| Pp: Connoquenessing and Sharon Formations (Lower Pennsylvanian) |
| Q: Glacial and Alluvial Deposits (Quaternary) |
| Sab: Akron Dolostone (Upper Silurian) |
| Sbs: Bloomsburg Formation (Upper Silurian) |
| Scc: Cobleskill Limestone (Upper Silurian) |
| Scl: Clinton Group (Silurian) |
| Scs: Cobleskill Limestone (Upper Silurian) |
| Scv: Camillus, Syracuse, and Vernon Formations (Upper Silurian) |
| Scy: Camillus and Syracuse Formations (Upper Silurian) |
| Sik: Irondequoit Limestone thru Kodak Sandstone (Lower Silurian) |
| Sl: Ilion Shale (Upper Silurian) |
| Sm: Medina Group (Lower Silurian) |
| SmOq: Undifferentiated Medina Group and Queenston Formation (Upper Ordovician - Lower Silurian) |
| Sr: Decew Dolostone and Rochester Shale (Lower Silurian) |
| Srp: Rondout Formation (Upper Silurian) |
| Ssy: Syracuse Formation (Upper Silurian) |
| Sv: Vernon Shale (Upper Silurian) |
| Trb: Brunswick Formation, undivided (Upper Triassic) |
| Trba: Brunswick Formation (Upper Triassic) |
| Trbg: Brunswick Formation (Upper Triassic) |
| Trbs: Brunswick Formation (Upper Triassic) |
| Trhc: Hammer Creek Formation (Upper Triassic) |
| Trl: Ladentown diabase and baslatic lava (Upper Triassic) |
| Trp: Palisade Diabase (Early Jurassic) |
| Trs: Stockton Formation (Upper Triassic) |
| a: Metanorthosite and anorthositic gneiss (Middle Proterozoic) |
| ach: Hybrid rock: mangeritic to charnockitic gneiss (Middle Proterozoic) |
| ack: Interlayered gabbroic or noritic metanorthosite (Middle Proterozoic) |
| am: Amphibolite (Middle Proterozoic) |
| amg: Interlayered amphibolite and granitic, charnockitic, mangeritic, or syenitic gneiss (Middle Proterozoic) |
| amu: Hybrid rock: anorthositic and metasedimentary rock (Middle Proterozoic) |
| ao: Gabbroic or noritic metanorthosite (Middle Proterozoic) |
| bg: Biotite granite gneiss (Middle Proterozoic) |
| bhg: Biotite-hornblende granite and granite gneiss (Middle Proterozoic) |
| bqp: Biotite-quartz-plagioclase paragneiss, amphibolite, and related migmatite (Middle Proterozoic) |
| bqpc: Biotite-quartz-plagioclase gneiss (Middle Proterozoic) |
| bqpq: Biotite-quartz-plagioclase paragneiss (Middle Proterozoic) |
| cs: Dolomitic and calcitic marbles interlayered with significant amounts of calcsilicate rock (Middle Proterozoic) |
| f: Fordham Gneiss, undivided (Precambrian - Middle Proterozoic ) |
| fa: Fordham Gneiss (A member) (Precambrian - Middle Proterozoic ) |
| fb: Fordham Gneiss (B member) (Precambrian - Middle Proterozoic ) |
| fc: Fordham Gneiss (C and D member) (Precambrian - Middle Proterozoic ) |
| fe: Fordham Gneiss (E member) (Precambrian - Middle Proterozoic ) |
| ffg: Ferrohedenbergite-fayalite granite and granite gneiss (Middle Proterozoic) |
| garb: Quartz-feldspar gneiss (Middle Proterozoic) |
| gb: Metagabbro (Middle Proterozoic) |
| h2o: water (Holocene) |
| hbg: Biotite and/or hornblende granite gneiss (Middle Proterozoic) |
| hbgo: Biotite and/or hornblende granite gneiss (Middle Proterozoic) |
| hg: Hornblende granite and granite gneiss (Middle Proterozoic) |
| hqs: Hornblende-quartz syenite gneiss (Middle Proterozoic) |
| hs: Hornblende syenite gneiss (Middle Proterozoic) |
| lg: Leucogranitic (alaskitic) gneiss (Middle Proterozoic) |
| mb: Calcitic and dolomitic marble (Middle Proterozoic) |
| mu: Undivided metasedimentary rock and related migmatite (Middle Proterozoic) |
| mug: Interlayered metasedimentary rock and granitic, charnockitic, mangeritic, or syenitic gneiss (Middle Proterozoic) |
| pg: Poundridge Gneiss (Middle Proterozoic) |
| phg: Pyroxene and/or hornblende granitic gneiss (Middle Proterozoic) |
| phgs: Charnockite, granitic and quartz syenite gneiss (Middle Proterozoic) |
| phqs: Charnockite, mangerite, pyroxene-quartz syenite gneiss (Middle Proterozoic) |
| ps: Mangerite, pyroxene-(hornblende) syenite gneiss (Middle Proterozoic) |
| qpg: Pyroxene-hornblende-quartz-plagioclase gneiss (Middle Proterozoic) |
| qt: Quartzite, quartz-biotite schist and graphitic schist (Middle Proterozoic) |
| qtcs: Garnet-biotite-quartz-feldspar gneiss (Middle Proterozoic) |
| qtlg: Garnet-bearing gneiss and interlayered quartzite (Middle Proterozoic) |
| rg: Rusty and gray biotite-quartz-feldspar gneiss (Middle Proterozoic) |
| sc: Sillimanite-cordierite-almandine-biotite-quartz-feldspar gneiss (Middle Proterozoic) |
| y: Yonkers Gneiss (Middle Proterozoic) |
