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Preliminary Integrated Geologic Map Databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, Vermont

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
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• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
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• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
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• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Nicholson, Suzanne W. , Dicken, Connie L. , Horton, John D. , Foose, Michael P. , Mueller, Julia A.L. , and Hon, Rudi, 2006, Preliminary Integrated Geologic Map Databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, Vermont: U.S. Geological Survey Open-File Report 2006-1272, U.S. Geological Survey, Reston, VA.

   Online Links:

   • <http://pubs.usgs.gov/of/2006/1272/>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -73.509

   East_Bounding_Coordinate: -69.781

   North_Bounding_Coordinate: 42.887

   South_Bounding_Coordinate: 41.142

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 2006

   Currentness_Reference: publication date

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: map

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Vector data set.

   2. What coordinate system is used to represent geographic features?

      The map projection used is Lambert Conformal Conic.

      Projection parameters:

      Standard_Parallel: 33

      Standard_Parallel: 45

      Longitude_of_Central_Meridian: -100.0

      Latitude_of_Projection_Origin: 0

      False_Easting: 0.00000

      False_Northing: 0.00000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.01
      Ordinates (y-coordinates) are specified to the nearest 0.01
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
      

7. How does the data set describe geographic features?

   MA_geol.pat

   Polygon attribute table for the Massachusetts geologic coverage. (Source: ESRI)

   ORIG_LABEL

   unmodified map unit symbol from source cover.

   type: character width: 12 output width: 12 (Source: Doug Stoeser (USGS))

   Value	Definition
   am	Belchertown Complex
   cu	Cumberlandite
   Dbd	Belchertown Complex
   Dbh	Belchertown Complex
   Dbi	Belchertown Complex
   Dbmd	Belchertown Complex
   Dbmdg	Belchertown Complex
   Dbmdt	Belchertown Complex
   Dbp	Belchertown Complex
   Dbt	Belchertown Complex
   Dcgr	Chelmsford Granite
   Dchgr	Coys Hill Porphyritic Granite Gneiss
   Dchh	Coys Hill Porphyritic Granite Gneiss
   Dcygr	Cherry Hill Granite
   Ddi	Biotite-hornblende diorite and quartz-bearing diorite
   Ddn	Meladiorite and norite
   De	Erving Formation
   Dea	Erving Formation
   Deg	Erving Formation
   Dev	Erving Formation
   Dfgd	Fitchburg Complex
   Dfgds	Fitchburg Complex
   Dfgr	Fitchburg Complex
   Dfgrg	Fitchburg Complex
   Dft	Fitchburg Complex
   Dg	Goshen Formation
   Dgc	Goshen Formation
   Dgd	Granodiorite
   Dgl	Goshen Formation
   Dgm	Gile Mountain Formation
   Dgma	Gile Mountain Formation
   Dgmq	Gile Mountain Formation
   Dgp	Goshen Formation
   Dgq	Goshen Formation
   Dgr	Biotite-muscovite granite
   Dgu	Goshen Formation
   Dhgr	Hardwick Tonalite
   Dht	Hardwick Tonalite
   di	Fine-grained hornblende diorite
   Dl	Littleton Formation
   Dl+Ops	Intimately interfolded Littleton and Partridge Formations
   Dlf	Littleton Formation
   Dlm	Littleton Formation
   Dlo	Littleton Formation
   Dmg	Middlefield Granite
   Dmgr	Muscovite-bearing granite
   DOgr	Alkalic granite in Franklin
   Dpe	Feldspar-quartz-muscovite pegmatite
   Dpgb	Prescott Complex
   Dpgg	Cooleyville Granitic Gneiss
   Dpgr	Peabody Granite
   Dpv	Putney Volcanics
   Drgr	Granite of Rattlesnake Hill pluton
   Drh	Biotite-garnet-feldspar gneiss of Ragged Hill
   DSdi	Diorite and tonalite
   DSn	Newbury Volcanic Complex
   DSna	Newbury Volcanic Complex
   DSnl	Newbury Volcanic Complex
   DSnr	Newbury Volcanic Complex
   DSnu	Newbury Volcanic Complex
   DSw	Worcester Formation
   Dw	Waits River Formation
   Dwa	Waits River Formation
   Dwgd	Williamsburg Granodiorite
   Dwm	Wenham Monzonite
   Dwt	Waits River Formation
   DZl	Lynn Volcanic Complex
   Ebw	Braintree Argillite and Weymouth Formation
   Ec	Cheshire Quartzite
   Eg	Green Lodge Formation of Rhodes and Graves
   Eh	Hoppin Formation
   Ehh	Hatch Hill Formation
   Esa	Stockbridge Formation
   Esb	Stockbridge Formation
   Esc	Stockbridge Formation
   EZcm	Canaan Mountain Formation
   EZd	Dalton Formation
   EZdbs	Dalton Formation
   EZdc	Dalton Formation
   EZdg	Dalton Formation
   EZdq	Dalton Formation
   EZds	Dalton Formation
   EZev	Everett Formation
   EZevc	Everett Formation
   EZg	Greylock Schist
   EZga	Greylock Schist
   EZh	Hoosac Formation
   EZha	Hoosac Formation
   EZhd	Hoosac Formation
   EZhda	Hoosac Formation
   EZhdc	Hoosac Formation
   EZhg	Hoosac Formation
   EZhga	Hoosac Formation
   EZhgt	Hoosac Formation
   EZhk	Hoosac Formation
   EZhr	Hoosac Formation
   EZhw	Hoosac Formation
   EZn	Nassau Formation
   EZna	Nassau Formation
   EZngy	Nassau Formation
   EZnp	Nassau Formation
   EZnr	Nassau Formation
   EZnv	Nassau Formation
   EZw+n	West Castleton and Nassau Formations, undivided
   fgr	Fine-grained granite and granite porphyry
   gb	Hornblende-olivine gabbro
   gd	Granodiorite
   gf	Belchertown Complex
   gr	Granite
   grg	Biotite granitic gneiss
   hg	Hornblende-plagioclase gneiss
   igd	Granodiorite of the Indian Head pluton
   Jd	Diabase dikes and sills
   Jdb	Deerfield Basalt
   Je	East Berlin Formation
   Jec	East Berlin Formation
   Jfg	Mylonite along Connecticut Valley border fault
   Jgb	Granby Basaltic Tuff
   Jhab	Hampden Basalt
   Jhb	Holyoke Basalt
   Jhv	Hitchcock Volcanics
   Jm	Mount Toby Formation
   Jma	Mount Toby Formation
   Jmc	Mount Toby Formation
   Jmg	Mount Toby Formation
   Jn	New Haven Arkose
   Jp	Portland Formation
   Jpc	Portland Formation
   Js	Sugarloaf Formation
   Jsc	Sugarloaf Formation
   Jsi	Silicified fault-breccia or strongly silicified metamorphic rocks
   Jsm	Shuttle Meadow Formation
   Jsmc	Shuttle Meadow Formation
   Jt	Turner Falls Sandstone
   Jtc	Turner Falls Sandstone
   K	Cretaceous sediments
   mgr	Light-gray muscovite granite
   Oa	Ammonoosuc Volcanics
   Oagl	Austin Glen Graywacke
   Oaq	Ammonoosuc Volcanics
   Oau	Ammonoosuc Volcanics
   Oca	Cobble Mountain Formation
   Ocar	Cobble Mountain Formation
   Ocb	Cobble Mountain Formation
   Ocbr	Cobble Mountain Formation
   Occ	Cobble Mountain Formation
   Occa	Cobble Mountain Formation
   Occr	Cobble Mountain Formation
   Ocd	Cobble Mountain Formation
   Oco	Collinsville Formation
   Ocoa	Collinsville Formation
   Ocoa1	Collinsville Formation
   Ocoa2	Collinsville Formation
   Ocoa3	Collinsville Formation
   Ococ	Collinsville Formation
   Ocof	Collinsville Formation
   Ocog	Collinsville Formation
   Ocor	Collinsville Formation
   Ocu	Cobble Mountain Formation
   Od	Diorite at Goff Ledges
   OEr	Rowe Schist
   OEra	Rowe Schist
   OErc	Rowe Schist
   Ogd	Diorite at Goff Ledges
   Ogl	Glastonbury Gneiss
   Ogr	White to gray and black-spotted muscovite-biotite granite and granodiorite
   Oh	Hawley Formation
   Ohb	Hawley Formation
   Ohf	Hawley Formation
   Ohg	Hawley Formation
   Ohp	Hawley Formation
   Ohpg	Gneiss at Hallockville Pond
   Om	Moretown Formation
   Oma	Moretown Formation
   Omal	Moretown Formation
   Oms	Moretown Formation
   Omsc	Moretown Formation
   Omsk	Moretown Formation
   Ongb	Nahant Gabbro and gabbro at Salem Neck
   Opa	Partridge Formation
   Opau	Partridge Formation
   Opbg	Partridge Formation
   Opc	Pauchaug Gneiss
   Opf	Partridge Formation
   Opo	Poultney Formation
   Ops	Partridge Formation
   Opsa	Partridge Formation
   Opsc	Partridge Formation
   Opsg	Partridge Formation
   Opu	Partridge Formation
   Opv	Partridge Formation
   Opvs	Partridge Formation
   Osd	Stockbridge Formation
   Ose	Stockbridge Formation
   Osf	Stockbridge Formation
   Osg	Stockbridge Formation
   Otb	Tectonic breccia
   Otbl	Tectonic breccia
   Otr	White, magnetite-bearing alaskite and trondhjemite
   Ow	Walloomsac Formation
   Owl	Walloomsac Formation
   Owm	Walloomsac Formation
   Owq	Walloomsac Formation
   OZf	Fish Brook Gneiss
   OZfm	Fourmile Gneiss
   OZfmq	Fourmile Gneiss
   OZfmu	Fourmile Gneiss
   OZm	Marlboro Formation
   OZma	Massabesic Gneiss Complex
   OZmg	Marlboro Formation
   OZmo	Monson Gneiss
   OZmoa	Monson Gneiss
   OZmou	Monson Gneiss
   OZn	Nashoba Formation
   OZnb	Nashoba Formation
   OZq	Quinebaug Formation
   OZsh	Shawsheen Gneiss
   OZt	Tatnic Hill Formation
   OZtf	Tatnic Hill Formation
   OZty	Tatnic Hill Formation
   OZu	Serpentinized peridotite stocks
   Pcm	Coal Mine Brook Formation
   Pd	Dighton Conglomerate
   Pgr	Massive to weakly foliated, pink and gray, fine- to medium-grained biotite granite
   Ph	Harvard Conglomerate
   Pp	Pondville Conglomerate
   Pr	Rhode Island Formation
   Prc	Rhode Island Formation
   Pw	Wamsutta Formation
   Pwv	Wamsutta Formation
   PZb	Bellingham Conglomerate
   PzZc	Cambridge Argillite
   PzZr	Roxbury Conglomerate
   PzZrb	Roxbury Conglomerate
   q	Massive quartz and silicified rock
   qd	Quartz diorite
   Sacgr	Ayer Granite, Clinton facies
   Sagr	Ayer Granite
   Sb	Berwick Formation
   Sbs	Berwick Formation
   Sc	Clough Quartzite
   Se	Eliot Formation
   Sf	Fitch Formation
   Sfs	Fitch Formation
   Sfss	Fitch Formation
   Sgr	Orange-pink, rusty-weathering, medium- to coarse-grained biotite granite to granodiorite
   Sngr	Newburyport Complex
   So	Oakdale Formation
   SOad	Ayer Granite
   SOagr	Andover Granite
   SObgr	Blue Hill Granite Porphyry
   SObo	Boylston Schist
   SOcb	Cape Ann Complex
   SOcgr	Cape Ann Complex
   SOcsm	Cape Ann Complex
   SOk	Kittery Formation
   SOngd	Newburyport Complex
   SOqgr	Quincy Granite
   SOrh	Reubens Hill Formation
   SOvh	Vaughn Hills Quartzite
   Sp	Paxton Formation
   Spa	Paxton Formation
   Spbc	Paxton Formation
   Spbs	Paxton Formation
   Spqr	Paxton Formation
   Spso	Paxton Formation
   Spsq	Paxton Formation
   Spss	Paxton Formation
   Sr	Russell Mountain Formation
   Ssaqd	Straw Hollow Diorite and Assabet Quartz Diorite undifferentiated
   Ssqd	Sharpners Pond Diorite
   St	Tower Hill Quartzite
   Sts	Tower Hill Quartzite
   SZtb	Tadmuck Brook Schist
   T	Tertiary sediments
   Tre	Red arkosic conglomerate, sandstone, and siltstone
   Trn	New Haven Arkose
   TRs	Sugarloaf Formation
   u	Serpentinite and/or talc rock
   Water	Water
   Ya	Massive amphibolite of uncertain age
   Yag	Black and white, well-layered hornblende-biotite-plagioclase gneiss and amphibolite
   Yb	Gray, well-layered biotite-plagioclase-quartz gneiss
   Ybu	Gray, well-layered biotite-plagioclase-quartz gneiss
   Ycs	Calc-silicate granofels and gneiss
   Yfg	Pinkish-gray, fine-grained, well-laminated felsic biotite-microcline-plagioclase-quartz gneiss
   Ygg	Granitoid Gneiss
   Yhb	Well-layered hornblende-biotite gneiss
   Yl	Lee Gneiss
   Ysg	Stamford Granite Gneiss
   Ysm	Sherman Marble
   Ytg	Tyringham Gneiss
   Yw	Washington Gneiss
   Ywb	Washington Gneiss
   Ywcs	Washington Gneiss
   Ywhg	Washington Gneiss
   Zagr	Alaskite
   Zb	Blackstone Group
   Zbq	Blackstone Group
   Zbs	Blackstone Group
   Zbv	Blackstone Group
   Zd	Biotite-hornblende mafic dikes
   Zdgr	Dedham Granite
   Zdh	Dry Hill Gneiss
   Zdhs	Dry Hill Gneiss
   Zdi	Diorite
   Zdigb	Diorite and gabbro
   Zdngr	Dedham Granite
   Zdpq	Dry Hill Gneiss
   Zegr	Esmond Granite
   Zfgr	Granite of the Fall River pluton
   Zfm	Felsic and mafic volcanic rocks
   Zgb	Gabbro
   Zgg	Granite, gneiss, and schist, undivided
   Zgmgd	Grant Mills Granodiorite
   Zgn	Biotite gneiss near New Bedford
   Zgr	Biotite granite
   Zgs	Gneiss and schist near New Bedford
   Zhg	Hope Valley Alaskite Gneiss
   Zm	Mattapan Volcanic Complex
   Zmgd	Milford granite
   Zmgr	Milford granite
   Zmm	Mount Mineral Formation
   Zmmu	Mount Mineral Formation
   Zp	Plainfield Formation
   Zpd	Undifferentiated Poplar Mountain and Dry Hill Gneisses
   Zpg	Ponaganset Gneiss
   Zpgr	Porphyritic granite
   Zpm	Poplar Mountain Gneiss
   Zpmg	Poplar Mountain Gneiss
   Zpmq	Poplar Mountain Gneiss
   Zrdi	Diorite at Rowley
   Zsg	Scituate Granite Gneiss
   Zssy	Sharon Syenite
   Ztgd	Topsfield Granodiorite
   Zv	Metamorphosed mafic to felsic flow, and volcaniclastic and hypabyssal intrusive rocks
   Zvf	Metamorphosed felsic metavolcanic rocks
   Zw	Westboro Formation
   Zwgr	Westwood Granite

   SGMC_LABEL

   orig_label + ;n where n= province number (n=0 if no province number)

   type: character width: 16 output width: 16 (Source: Doug Stoeser (USGS))

   Value	Definition
   am;0	Belchertown Complex
   CAbw;0	Braintree Argillite and Weymouth Formation
   CAc;0	Cheshire Quartzite
   CAg;0	Green Lodge Formation of Rhodes and Graves
   CAh;0	Hoppin Formation
   CAhh;0	Hatch Hill Formation
   CAsa;0	Stockbridge Formation
   CAsb;0	Stockbridge Formation
   CAsc;0	Stockbridge Formation
   CAZcm;0	Canaan Mountain Formation
   CAZd;0	Dalton Formation
   CAZdbs;0	Dalton Formation
   CAZdc;0	Dalton Formation
   CAZdg;0	Dalton Formation
   CAZdq;0	Dalton Formation
   CAZds;0	Dalton Formation
   CAZev;0	Everett Formation
   CAZevc;0	Everett Formation
   CAZg;0	Greylock Schist
   CAZga;0	Greylock Schist
   CAZh;0	Hoosac Formation
   CAZha;0	Hoosac Formation
   CAZhd;0	Hoosac Formation
   CAZhda;0	Hoosac Formation
   CAZhdc;0	Hoosac Formation
   CAZhg;0	Hoosac Formation
   CAZhga;0	Hoosac Formation
   CAZhgt;0	Hoosac Formation
   CAZhk;0	Hoosac Formation
   CAZhr;0	Hoosac Formation
   CAZhw;0	Hoosac Formation
   CAZn;0	Nassau Formation
   CAZna;0	Nassau Formation
   CAZngy;0	Nassau Formation
   CAZnp;0	Nassau Formation
   CAZnr;0	Nassau Formation
   CAZnv;0	Nassau Formation
   CAZw+n;0	West Castleton and Nassau Formations, undivided
   cu;0	Cumberlandite
   Dbd;0	Belchertown Complex
   Dbh;0	Belchertown Complex
   Dbi;0	Belchertown Complex
   Dbmd;0	Belchertown Complex
   Dbmdg;0	Belchertown Complex
   Dbmdt;0	Belchertown Complex
   Dbp;0	Belchertown Complex
   Dbt;0	Belchertown Complex
   Dcgr;0	Chelmsford Granite
   Dchgr;0	Coys Hill Porphyritic Granite Gneiss
   Dchh;0	Coys Hill Porphyritic Granite Gneiss
   Dcygr;0	Cherry Hill Granite
   Ddi;0	Biotite-hornblende diorite and quartz-bearing diorite
   Ddn;0	Meladiorite and norite
   De;0	Erving Formation
   Dea;0	Erving Formation
   Deg;0	Erving Formation
   Dev;0	Erving Formation
   Dfgd;0	Fitchburg Complex
   Dfgds;0	Fitchburg Complex
   Dfgr;0	Fitchburg Complex
   Dfgrg;0	Fitchburg Complex
   Dft;0	Fitchburg Complex
   Dg;0	Goshen Formation
   Dgc;0	Goshen Formation
   Dgd;0	Granodiorite
   Dgl;0	Goshen Formation
   Dgm;0	Gile Mountain Formation
   Dgma;0	Gile Mountain Formation
   Dgmq;0	Gile Mountain Formation
   Dgp;0	Goshen Formation
   Dgq;0	Goshen Formation
   Dgr;0	Biotite-muscovite granite
   Dgu;0	Goshen Formation
   Dhgr;0	Hardwick Tonalite
   Dht;0	Hardwick Tonalite
   di;0	Fine-grained hornblende diorite
   Dl;0	Littleton Formation
   Dl+Ops;0	Intimately interfolded Littleton and Partridge Formations
   Dlf;0	Littleton Formation
   Dlm;0	Littleton Formation
   Dlo;0	Littleton Formation
   Dmg;0	Middlefield Granite
   Dmgr;0	Muscovite-bearing granite
   DOgr;0	Alkalic granite in Franklin
   Dpe;0	Feldspar-quartz-muscovite pegmatite
   Dpgb;0	Prescott Complex
   Dpgg;0	Cooleyville Granitic Gneiss
   Dpgr;0	Peabody Granite
   Dpv;0	Putney Volcanics
   Drgr;0	Granite of Rattlesnake Hill pluton
   Drh;0	Biotite-garnet-feldspar gneiss of Ragged Hill
   DSdi;0	Diorite and tonalite
   DSn;0	Newbury Volcanic Complex
   DSna;0	Newbury Volcanic Complex
   DSnl;0	Newbury Volcanic Complex
   DSnr;0	Newbury Volcanic Complex
   DSnu;0	Newbury Volcanic Complex
   DSw;0	Worcester Formation
   Dw;0	Waits River Formation
   Dwa;0	Waits River Formation
   Dwgd;0	Williamsburg Granodiorite
   Dwm;0	Wenham Monzonite
   Dwt;0	Waits River Formation
   DZl;0	Lynn Volcanic Complex
   fgr;0	Fine-grained granite and granite porphyry
   gb;0	Hornblende-olivine gabbro
   gd;0	Granodiorite
   gf;0	Belchertown Complex
   gr;0	Granite
   grg;0	Biotite granitic gneiss
   hg;0	Hornblende-plagioclase gneiss
   igd;0	Granodiorite of the Indian Head pluton
   Jd;0	Diabase dikes and sills
   Jdb;0	Deerfield Basalt
   Je;0	East Berlin Formation
   Jec;0	East Berlin Formation
   Jfg;0	Mylonite along Connecticut Valley border fault
   Jgb;0	Granby Basaltic Tuff
   Jhab;0	Hampden Basalt
   Jhb;0	Holyoke Basalt
   Jhv;0	Hitchcock Volcanics
   Jm;0	Mount Toby Formation
   Jma;0	Mount Toby Formation
   Jmc;0	Mount Toby Formation
   Jmg;0	Mount Toby Formation
   Jn;0	New Haven Arkose
   Jp;0	Portland Formation
   Jpc;0	Portland Formation
   Js;0	Sugarloaf Formation
   Jsc;0	Sugarloaf Formation
   Jsi;0	Silicified fault-breccia or strongly silicified metamorphic rocks
   Jsm;0	Shuttle Meadow Formation
   Jsmc;0	Shuttle Meadow Formation
   Jt;0	Turner Falls Sandstone
   Jtc;0	Turner Falls Sandstone
   K;0	Cretaceous sediments
   mgr;0	Light-gray muscovite granite
   Oa;0	Ammonoosuc Volcanics
   Oagl;0	Austin Glen Graywacke
   Oaq;0	Ammonoosuc Volcanics
   Oau;0	Ammonoosuc Volcanics
   Oca;0	Cobble Mountain Formation
   Ocar;0	Cobble Mountain Formation
   OCAr;0	Rowe Schist
   OCAra;0	Rowe Schist
   OCArc;0	Rowe Schist
   Ocb;0	Cobble Mountain Formation
   Ocbr;0	Cobble Mountain Formation
   Occ;0	Cobble Mountain Formation
   Occa;0	Cobble Mountain Formation
   Occr;0	Cobble Mountain Formation
   Ocd;0	Cobble Mountain Formation
   Oco;0	Collinsville Formation
   Ocoa;0	Collinsville Formation
   Ocoa1;0	Collinsville Formation
   Ocoa2;0	Collinsville Formation
   Ocoa3;0	Collinsville Formation
   Ococ;0	Collinsville Formation
   Ocof;0	Collinsville Formation
   Ocog;0	Collinsville Formation
   Ocor;0	Collinsville Formation
   Ocu;0	Cobble Mountain Formation
   Od;0	Diorite at Goff Ledges
   Ogd;0	Diorite at Goff Ledges
   Ogl;0	Glastonbury Gneiss
   Ogr;0	White to gray and black-spotted muscovite-biotite granite and granodiorite
   Oh;0	Hawley Formation
   Ohb;0	Hawley Formation
   Ohf;0	Hawley Formation
   Ohg;0	Hawley Formation
   Ohp;0	Hawley Formation
   Ohpg;0	Gneiss at Hallockville Pond
   Om;0	Moretown Formation
   Oma;0	Moretown Formation
   Omal;0	Moretown Formation
   Oms;0	Moretown Formation
   Omsc;0	Moretown Formation
   Omsk;0	Moretown Formation
   Ongb;0	Nahant Gabbro and gabbro at Salem Neck
   Opa;0	Partridge Formation
   Opau;0	Partridge Formation
   Opbg;0	Partridge Formation
   Opc;0	Pauchaug Gneiss
   Opf;0	Partridge Formation
   Opo;0	Poultney Formation
   Ops;0	Partridge Formation
   Opsa;0	Partridge Formation
   Opsc;0	Partridge Formation
   Opsg;0	Partridge Formation
   Opu;0	Partridge Formation
   Opv;0	Partridge Formation
   Opvs;0	Partridge Formation
   Osd;0	Stockbridge Formation
   Ose;0	Stockbridge Formation
   Osf;0	Stockbridge Formation
   Osg;0	Stockbridge Formation
   Otb;0	Tectonic breccia
   Otbl;0	Tectonic breccia
   Otr;0	White, magnetite-bearing alaskite and trondhjemite
   Ow;0	Walloomsac Formation
   Owl;0	Walloomsac Formation
   Owm;0	Walloomsac Formation
   Owq;0	Walloomsac Formation
   OZf;0	Fish Brook Gneiss
   OZfm;0	Fourmile Gneiss
   OZfmq;0	Fourmile Gneiss
   OZfmu;0	Fourmile Gneiss
   OZm;0	Marlboro Formation
   OZma;0	Massabesic Gneiss Complex
   OZmg;0	Marlboro Formation
   OZmo;0	Monson Gneiss
   OZmoa;0	Monson Gneiss
   OZmou;0	Monson Gneiss
   OZn;0	Nashoba Formation
   OZnb;0	Nashoba Formation
   OZq;0	Quinebaug Formation
   OZsh;0	Shawsheen Gneiss
   OZt;0	Tatnic Hill Formation
   OZtf;0	Tatnic Hill Formation
   OZty;0	Tatnic Hill Formation
   OZu;0	Serpentinized peridotite stocks
   PAcm;0	Coal Mine Brook Formation
   PAd;0	Dighton Conglomerate
   PAgr;0	Massive to weakly foliated, pink and gray, fine- to medium-grained biotite granite
   PAh;0	Harvard Conglomerate
   PAp;0	Pondville Conglomerate
   PAr;0	Rhode Island Formation
   PArc;0	Rhode Island Formation
   PAw;0	Wamsutta Formation
   PAwv;0	Wamsutta Formation
   PAZb;0	Bellingham Conglomerate
   PZZc;0	Cambridge Argillite
   PZZr;0	Roxbury Conglomerate
   PZZrb;0	Roxbury Conglomerate
   q;0	Massive quartz and silicified rock
   qd;0	Quartz diorite
   Sacgr;0	Ayer Granite, Clinton facies
   Sagr;0	Ayer Granite
   Sb;0	Berwick Formation
   Sbs;0	Berwick Formation
   Sc;0	Clough Quartzite
   Se;0	Eliot Formation
   Sf;0	Fitch Formation
   Sfs;0	Fitch Formation
   Sfss;0	Fitch Formation
   Sgr;0	Orange-pink, rusty-weathering, medium- to coarse-grained biotite granite to granodiorite
   Sngr;0	Newburyport Complex
   So;0	Oakdale Formation
   SOad;0	Ayer Granite
   SOagr;0	Andover Granite
   SObgr;0	Blue Hill Granite Porphyry
   SObo;0	Boylston Schist
   SOcb;0	Cape Ann Complex
   SOcgr;0	Cape Ann Complex
   SOcsm;0	Cape Ann Complex
   SOk;0	Kittery Formation
   SOngd;0	Newburyport Complex
   SOqgr;0	Quincy Granite
   SOrh;0	Reubens Hill Formation
   SOvh;0	Vaughn Hills Quartzite
   Sp;0	Paxton Formation
   Spa;0	Paxton Formation
   Spbc;0	Paxton Formation
   Spbs;0	Paxton Formation
   Spqr;0	Paxton Formation
   Spso;0	Paxton Formation
   Spsq;0	Paxton Formation
   Spss;0	Paxton Formation
   Sr;0	Russell Mountain Formation
   Ssaqd;0	Straw Hollow Diorite and Assabet Quartz Diorite undifferentiated
   Ssqd;0	Sharpners Pond Diorite
   St;0	Tower Hill Quartzite
   Sts;0	Tower Hill Quartzite
   SZtb;0	Tadmuck Brook Schist
   T;0	Tertiary sediments
   TRe;0	Red arkosic conglomerate, sandstone, and siltstone
   TRn;0	New Haven Arkose
   TRs;0	Sugarloaf Formation
   u;0	Serpentinite and/or talc rock
   water;0	Water
   Ya;0	Massive amphibolite of uncertain age
   Yag;0	Black and white, well-layered hornblende-biotite-plagioclase gneiss and amphibolite
   Yb;0	Gray, well-layered biotite-plagioclase-quartz gneiss
   Ybu;0	Gray, well-layered biotite-plagioclase-quartz gneiss
   Ycs;0	Calc-silicate granofels and gneiss
   Yfg;0	Pinkish-gray, fine-grained, well-laminated felsic biotite-microcline-plagioclase-quartz gneiss
   Ygg;0	Granitoid Gneiss
   Yhb;0	Well-layered hornblende-biotite gneiss
   Yl;0	Lee Gneiss
   Ysg;0	Stamford Granite Gneiss
   Ysm;0	Sherman Marble
   Ytg;0	Tyringham Gneiss
   Yw;0	Washington Gneiss
   Ywb;0	Washington Gneiss
   Ywcs;0	Washington Gneiss
   Ywhg;0	Washington Gneiss
   Zagr;0	Alaskite
   Zb;0	Blackstone Group
   Zbq;0	Blackstone Group
   Zbs;0	Blackstone Group
   Zbv;0	Blackstone Group
   Zd;0	Biotite-hornblende mafic dikes
   Zdgr;0	Dedham Granite
   Zdh;0	Dry Hill Gneiss
   Zdhs;0	Dry Hill Gneiss
   Zdi;0	Diorite
   Zdigb;0	Diorite and gabbro
   Zdngr;0	Dedham Granite
   Zdpq;0	Dry Hill Gneiss
   Zegr;0	Esmond Granite
   Zfgr;0	Granite of the Fall River pluton
   Zfm;0	Felsic and mafic volcanic rocks
   Zgb;0	Gabbro
   Zgg;0	Granite, gneiss, and schist, undivided
   Zgmgd;0	Grant Mills Granodiorite
   Zgn;0	Biotite gneiss near New Bedford
   Zgr;0	Biotite granite
   Zgs;0	Gneiss and schist near New Bedford
   Zhg;0	Hope Valley Alaskite Gneiss
   Zm;0	Mattapan Volcanic Complex
   Zmgd;0	Milford granite
   Zmgr;0	Milford granite
   Zmm;0	Mount Mineral Formation
   Zmmu;0	Mount Mineral Formation
   Zp;0	Plainfield Formation
   Zpd;0	Undifferentiated Poplar Mountain and Dry Hill Gneisses
   Zpg;0	Ponaganset Gneiss
   Zpgr;0	Porphyritic granite
   Zpm;0	Poplar Mountain Gneiss
   Zpmg;0	Poplar Mountain Gneiss
   Zpmq;0	Poplar Mountain Gneiss
   Zrdi;0	Diorite at Rowley
   Zsg;0	Scituate Granite Gneiss
   Zssy;0	Sharon Syenite
   Ztgd;0	Topsfield Granodiorite
   Zv;0	Metamorphosed mafic to felsic flow, and volcaniclastic and hypabyssal intrusive rocks
   Zvf;0	Metamorphosed felsic metavolcanic rocks
   Zw;0	Westboro Formation
   Zwgr;0	Westwood Granite

   unit_link

   composite map label = ST + sgmc_label This creates a unique identifier for every unit in the CONUS (continental United States) covers.

   type: character width: 18 output width: 18 (Source: Doug Stoeser (USGS))

   Value	Definition
   MAam;0	Belchertown Complex
   MACAbw;0	Braintree Argillite and Weymouth Formation
   MACAc;0	Cheshire Quartzite
   MACAg;0	Green Lodge Formation of Rhodes and Graves
   MACAh;0	Hoppin Formation
   MACAhh;0	Hatch Hill Formation
   MACAsa;0	Stockbridge Formation
   MACAsb;0	Stockbridge Formation
   MACAsc;0	Stockbridge Formation
   MACAZcm;0	Canaan Mountain Formation
   MACAZd;0	Dalton Formation
   MACAZdbs;0	Dalton Formation
   MACAZdc;0	Dalton Formation
   MACAZdg;0	Dalton Formation
   MACAZdq;0	Dalton Formation
   MACAZds;0	Dalton Formation
   MACAZev;0	Everett Formation
   MACAZevc;0	Everett Formation
   MACAZg;0	Greylock Schist
   MACAZga;0	Greylock Schist
   MACAZh;0	Hoosac Formation
   MACAZha;0	Hoosac Formation
   MACAZhd;0	Hoosac Formation
   MACAZhda;0	Hoosac Formation
   MACAZhdc;0	Hoosac Formation
   MACAZhg;0	Hoosac Formation
   MACAZhga;0	Hoosac Formation
   MACAZhgt;0	Hoosac Formation
   MACAZhk;0	Hoosac Formation
   MACAZhr;0	Hoosac Formation
   MACAZhw;0	Hoosac Formation
   MACAZn;0	Nassau Formation
   MACAZna;0	Nassau Formation
   MACAZngy;0	Nassau Formation
   MACAZnp;0	Nassau Formation
   MACAZnr;0	Nassau Formation
   MACAZnv;0	Nassau Formation
   MACAZw+n;0	West Castleton and Nassau Formations, undivided
   MAcu;0	Cumberlandite
   MADbd;0	Belchertown Complex
   MADbh;0	Belchertown Complex
   MADbi;0	Belchertown Complex
   MADbmd;0	Belchertown Complex
   MADbmdg;0	Belchertown Complex
   MADbmdt;0	Belchertown Complex
   MADbp;0	Belchertown Complex
   MADbt;0	Belchertown Complex
   MADcgr;0	Chelmsford Granite
   MADchgr;0	Coys Hill Porphyritic Granite Gneiss
   MADchh;0	Coys Hill Porphyritic Granite Gneiss
   MADcygr;0	Cherry Hill Granite
   MADdi;0	Biotite-hornblende diorite and quartz-bearing diorite
   MADdn;0	Meladiorite and norite
   MADe;0	Erving Formation
   MADea;0	Erving Formation
   MADeg;0	Erving Formation
   MADev;0	Erving Formation
   MADfgd;0	Fitchburg Complex
   MADfgds;0	Fitchburg Complex
   MADfgr;0	Fitchburg Complex
   MADfgrg;0	Fitchburg Complex
   MADft;0	Fitchburg Complex
   MADg;0	Goshen Formation
   MADgc;0	Goshen Formation
   MADgd;0	Granodiorite
   MADgl;0	Goshen Formation
   MADgm;0	Gile Mountain Formation
   MADgma;0	Gile Mountain Formation
   MADgmq;0	Gile Mountain Formation
   MADgp;0	Goshen Formation
   MADgq;0	Goshen Formation
   MADgr;0	Biotite-muscovite granite
   MADgu;0	Goshen Formation
   MADhgr;0	Hardwick Tonalite
   MADht;0	Hardwick Tonalite
   MAdi;0	Fine-grained hornblende diorite
   MADl;0	Littleton Formation
   MADl+Ops;0	Intimately interfolded Littleton and Partridge Formations
   MADlf;0	Littleton Formation
   MADlm;0	Littleton Formation
   MADlo;0	Littleton Formation
   MADmg;0	Middlefield Granite
   MADmgr;0	Muscovite-bearing granite
   MADOgr;0	Alkalic granite in Franklin
   MADpe;0	Feldspar-quartz-muscovite pegmatite
   MADpgb;0	Prescott Complex
   MADpgg;0	Cooleyville Granitic Gneiss
   MADpgr;0	Peabody Granite
   MADpv;0	Putney Volcanics
   MADrgr;0	Granite of Rattlesnake Hill pluton
   MADrh;0	Biotite-garnet-feldspar gneiss of Ragged Hill
   MADSdi;0	Diorite and tonalite
   MADSn;0	Newbury Volcanic Complex
   MADSna;0	Newbury Volcanic Complex
   MADSnl;0	Newbury Volcanic Complex
   MADSnr;0	Newbury Volcanic Complex
   MADSnu;0	Newbury Volcanic Complex
   MADSw;0	Worcester Formation
   MADw;0	Waits River Formation
   MADwa;0	Waits River Formation
   MADwgd;0	Williamsburg Granodiorite
   MADwm;0	Wenham Monzonite
   MADwt;0	Waits River Formation
   MADZl;0	Lynn Volcanic Complex
   MAfgr;0	Fine-grained granite and granite porphyry
   MAgb;0	Hornblende-olivine gabbro
   MAgd;0	Granodiorite
   MAgf;0	Belchertown Complex
   MAgr;0	Granite
   MAgrg;0	Biotite granitic gneiss
   MAhg;0	Hornblende-plagioclase gneiss
   MAigd;0	Granodiorite of the Indian Head pluton
   MAJd;0	Diabase dikes and sills
   MAJdb;0	Deerfield Basalt
   MAJe;0	East Berlin Formation
   MAJec;0	East Berlin Formation
   MAJfg;0	Mylonite along Connecticut Valley border fault
   MAJgb;0	Granby Basaltic Tuff
   MAJhab;0	Hampden Basalt
   MAJhb;0	Holyoke Basalt
   MAJhv;0	Hitchcock Volcanics
   MAJm;0	Mount Toby Formation
   MAJma;0	Mount Toby Formation
   MAJmc;0	Mount Toby Formation
   MAJmg;0	Mount Toby Formation
   MAJn;0	New Haven Arkose
   MAJp;0	Portland Formation
   MAJpc;0	Portland Formation
   MAJs;0	Sugarloaf Formation
   MAJsc;0	Sugarloaf Formation
   MAJsi;0	Silicified fault-breccia or strongly silicified metamorphic rocks
   MAJsm;0	Shuttle Meadow Formation
   MAJsmc;0	Shuttle Meadow Formation
   MAJt;0	Turner Falls Sandstone
   MAJtc;0	Turner Falls Sandstone
   MAK;0	Cretaceous sediments
   MAmgr;0	Light-gray muscovite granite
   MAOa;0	Ammonoosuc Volcanics
   MAOagl;0	Austin Glen Graywacke
   MAOaq;0	Ammonoosuc Volcanics
   MAOau;0	Ammonoosuc Volcanics
   MAOca;0	Cobble Mountain Formation
   MAOcar;0	Cobble Mountain Formation
   MAOCAr;0	Rowe Schist
   MAOCAra;0	Rowe Schist
   MAOCArc;0	Rowe Schist
   MAOcb;0	Cobble Mountain Formation
   MAOcbr;0	Cobble Mountain Formation
   MAOcc;0	Cobble Mountain Formation
   MAOcca;0	Cobble Mountain Formation
   MAOccr;0	Cobble Mountain Formation
   MAOcd;0	Cobble Mountain Formation
   MAOco;0	Collinsville Formation
   MAOcoa;0	Collinsville Formation
   MAOcoa1;0	Collinsville Formation
   MAOcoa2;0	Collinsville Formation
   MAOcoa3;0	Collinsville Formation
   MAOcoc;0	Collinsville Formation
   MAOcof;0	Collinsville Formation
   MAOcog;0	Collinsville Formation
   MAOcor;0	Collinsville Formation
   MAOcu;0	Cobble Mountain Formation
   MAOd;0	Diorite at Goff Ledges
   MAOgd;0	Diorite at Goff Ledges
   MAOgl;0	Glastonbury Gneiss
   MAOgr;0	White to gray and black-spotted muscovite-biotite granite and granodiorite
   MAOh;0	Hawley Formation
   MAOhb;0	Hawley Formation
   MAOhf;0	Hawley Formation
   MAOhg;0	Hawley Formation
   MAOhp;0	Hawley Formation
   MAOhpg;0	Gneiss at Hallockville Pond
   MAOm;0	Moretown Formation
   MAOma;0	Moretown Formation
   MAOmal;0	Moretown Formation
   MAOms;0	Moretown Formation
   MAOmsc;0	Moretown Formation
   MAOmsk;0	Moretown Formation
   MAOngb;0	Nahant Gabbro and gabbro at Salem Neck
   MAOpa;0	Partridge Formation
   MAOpau;0	Partridge Formation
   MAOpbg;0	Partridge Formation
   MAOpc;0	Pauchaug Gneiss
   MAOpf;0	Partridge Formation
   MAOpo;0	Poultney Formation
   MAOps;0	Partridge Formation
   MAOpsa;0	Partridge Formation
   MAOpsc;0	Partridge Formation
   MAOpsg;0	Partridge Formation
   MAOpu;0	Partridge Formation
   MAOpv;0	Partridge Formation
   MAOpvs;0	Partridge Formation
   MAOsd;0	Stockbridge Formation
   MAOse;0	Stockbridge Formation
   MAOsf;0	Stockbridge Formation
   MAOsg;0	Stockbridge Formation
   MAOtb;0	Tectonic breccia
   MAOtbl;0	Tectonic breccia
   MAOtr;0	White, magnetite-bearing alaskite and trondhjemite
   MAOw;0	Walloomsac Formation
   MAOwl;0	Walloomsac Formation
   MAOwm;0	Walloomsac Formation
   MAOwq;0	Walloomsac Formation
   MAOZf;0	Fish Brook Gneiss
   MAOZfm;0	Fourmile Gneiss
   MAOZfmq;0	Fourmile Gneiss
   MAOZfmu;0	Fourmile Gneiss
   MAOZm;0	Marlboro Formation
   MAOZma;0	Massabesic Gneiss Complex
   MAOZmg;0	Marlboro Formation
   MAOZmo;0	Monson Gneiss
   MAOZmoa;0	Monson Gneiss
   MAOZmou;0	Monson Gneiss
   MAOZn;0	Nashoba Formation
   MAOZnb;0	Nashoba Formation
   MAOZq;0	Quinebaug Formation
   MAOZsh;0	Shawsheen Gneiss
   MAOZt;0	Tatnic Hill Formation
   MAOZtf;0	Tatnic Hill Formation
   MAOZty;0	Tatnic Hill Formation
   MAOZu;0	Serpentinized peridotite stocks
   MAPAcm;0	Coal Mine Brook Formation
   MAPAd;0	Dighton Conglomerate
   MAPAgr;0	Massive to weakly foliated, pink and gray, fine- to medium-grained biotite granite
   MAPAh;0	Harvard Conglomerate
   MAPAp;0	Pondville Conglomerate
   MAPAr;0	Rhode Island Formation
   MAPArc;0	Rhode Island Formation
   MAPAw;0	Wamsutta Formation
   MAPAwv;0	Wamsutta Formation
   MAPAZb;0	Bellingham Conglomerate
   MAPZZc;0	Cambridge Argillite
   MAPZZr;0	Roxbury Conglomerate
   MAPZZrb;0	Roxbury Conglomerate
   MAq;0	Massive quartz and silicified rock
   MAqd;0	Quartz diorite
   MASacgr;0	Ayer Granite, Clinton facies
   MASagr;0	Ayer Granite
   MASb;0	Berwick Formation
   MASbs;0	Berwick Formation
   MASc;0	Clough Quartzite
   MASe;0	Eliot Formation
   MASf;0	Fitch Formation
   MASfs;0	Fitch Formation
   MASfss;0	Fitch Formation
   MASgr;0	Orange-pink, rusty-weathering, medium- to coarse-grained biotite granite to granodiorite
   MASngr;0	Newburyport Complex
   MASo;0	Oakdale Formation
   MASOad;0	Ayer Granite
   MASOagr;0	Andover Granite
   MASObgr;0	Blue Hill Granite Porphyry
   MASObo;0	Boylston Schist
   MASOcb;0	Cape Ann Complex
   MASOcgr;0	Cape Ann Complex
   MASOcsm;0	Cape Ann Complex
   MASOk;0	Kittery Formation
   MASOngd;0	Newburyport Complex
   MASOqgr;0	Quincy Granite
   MASOrh;0	Reubens Hill Formation
   MASOvh;0	Vaughn Hills Quartzite
   MASp;0	Paxton Formation
   MASpa;0	Paxton Formation
   MASpbc;0	Paxton Formation
   MASpbs;0	Paxton Formation
   MASpqr;0	Paxton Formation
   MASpso;0	Paxton Formation
   MASpsq;0	Paxton Formation
   MASpss;0	Paxton Formation
   MASr;0	Russell Mountain Formation
   MASsaqd;0	Straw Hollow Diorite and Assabet Quartz Diorite undifferentiated
   MASsqd;0	Sharpners Pond Diorite
   MASt;0	Tower Hill Quartzite
   MASts;0	Tower Hill Quartzite
   MASZtb;0	Tadmuck Brook Schist
   MAT;0	Tertiary sediments
   MATRe;0	Red arkosic conglomerate, sandstone, and siltstone
   MATRn;0	New Haven Arkose
   MATRs;0	Sugarloaf Formation
   MAu;0	Serpentinite and/or talc rock
   MAwater;0	Water
   MAYa;0	Massive amphibolite of uncertain age
   MAYag;0	Black and white, well-layered hornblende-biotite-plagioclase gneiss and amphibolite
   MAYb;0	Gray, well-layered biotite-plagioclase-quartz gneiss
   MAYbu;0	Gray, well-layered biotite-plagioclase-quartz gneiss
   MAYcs;0	Calc-silicate granofels and gneiss
   MAYfg;0	Pinkish-gray, fine-grained, well-laminated felsic biotite-microcline-plagioclase-quartz gneiss
   MAYgg;0	Granitoid Gneiss
   MAYhb;0	Well-layered hornblende-biotite gneiss
   MAYl;0	Lee Gneiss
   MAYsg;0	Stamford Granite Gneiss
   MAYsm;0	Sherman Marble
   MAYtg;0	Tyringham Gneiss
   MAYw;0	Washington Gneiss
   MAYwb;0	Washington Gneiss
   MAYwcs;0	Washington Gneiss
   MAYwhg;0	Washington Gneiss
   MAZagr;0	Alaskite
   MAZb;0	Blackstone Group
   MAZbq;0	Blackstone Group
   MAZbs;0	Blackstone Group
   MAZbv;0	Blackstone Group
   MAZd;0	Biotite-hornblende mafic dikes
   MAZdgr;0	Dedham Granite
   MAZdh;0	Dry Hill Gneiss
   MAZdhs;0	Dry Hill Gneiss
   MAZdi;0	Diorite
   MAZdigb;0	Diorite and gabbro
   MAZdngr;0	Dedham Granite
   MAZdpq;0	Dry Hill Gneiss
   MAZegr;0	Esmond Granite
   MAZfgr;0	Granite of the Fall River pluton
   MAZfm;0	Felsic and mafic volcanic rocks
   MAZgb;0	Gabbro
   MAZgg;0	Granite, gneiss, and schist, undivided
   MAZgmgd;0	Grant Mills Granodiorite
   MAZgn;0	Biotite gneiss near New Bedford
   MAZgr;0	Biotite granite
   MAZgs;0	Gneiss and schist near New Bedford
   MAZhg;0	Hope Valley Alaskite Gneiss
   MAZm;0	Mattapan Volcanic Complex
   MAZmgd;0	Milford granite
   MAZmgr;0	Milford granite
   MAZmm;0	Mount Mineral Formation
   MAZmmu;0	Mount Mineral Formation
   MAZp;0	Plainfield Formation
   MAZpd;0	Undifferentiated Poplar Mountain and Dry Hill Gneisses
   MAZpg;0	Ponaganset Gneiss
   MAZpgr;0	Porphyritic granite
   MAZpm;0	Poplar Mountain Gneiss
   MAZpmg;0	Poplar Mountain Gneiss
   MAZpmq;0	Poplar Mountain Gneiss
   MAZrdi;0	Diorite at Rowley
   MAZsg;0	Scituate Granite Gneiss
   MAZssy;0	Sharon Syenite
   MAZtgd;0	Topsfield Granodiorite
   MAZv;0	Metamorphosed mafic to felsic flow, and volcaniclastic and hypabyssal intrusive rocks
   MAZvf;0	Metamorphosed felsic metavolcanic rocks
   MAZw;0	Westboro Formation
   MAZwgr;0	Westwood Granite

   source

   An alphanumeric code (e.g. US001) that designates the source material used.

   type: character width: 6 output width: 8 (Source: Doug Stoeser (USGS))

   Value	Definition
   MA001	Unpublished digital map of Massachusetts (Rudi Hon at Boston College, 1998).
   US001	Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationNENJ.pdf)

   unit_age

   The geologic age from the source map used.

   type: character width: 60 output width: 60 (Source: Doug Stoeser (USGS))

   Value	Definition
   Cretaceous
   Devonian
   Devonian and Silurian
   Holocene
   Lower Cambrian
   Lower Cambrian and Proterozoic Z
   Lower Devonian
   Lower Devonian and Middle Ordovician
   Lower Devonian and Silurian
   Lower Devonian and Upper Silurian
   Lower Devonian or younger
   Lower Devonian, Silurian, or Proterozoic Z
   Lower Jurassic
   Lower Ordovician
   Lower Ordovician and Cambrian
   Lower Ordovician and Proterozoic Z
   Lower Pennsylvanian
   Lower Silurian
   Lower Silurian and Upper Ordovician
   Lower Silurian and Upper Ordovician?
   Lower Silurian or Upper Ordovician
   Middle Devonian
   Middle Ordovician
   Middle Ordovician or older
   Middle Pennsylvanian
   Middle and Lower Cambrian
   Middle and Lower Pennsylvanian
   Ordovician
   Ordovician and Proterozoic Z
   Ordovician or Proterozoic Z
   Ordovician to Proterozoic Z
   Ordovician, Cambrian, or Proterozoic Z
   Pennsylvanian
   Precambrian to Paleozoic
   Precambrian to Phanerozoic
   Precambrian to Silurian
   Proterozoic Y
   Proterozoic Z
   Proterozoic Z or younger
   Proterozoic Z to earliest Paleozoic
   Silurian
   Silurian or Ordovician
   Silurian?, Ordovician, or Proterozoic Z
   Upper Cambrian
   Upper Cambrian?
   Upper Pennsylvanian
   Upper Silurian
   Upper Triassic
   Upper and Middle Pennsylvanian
   age uncertain

   rocktype1

   The predominant lithology found in the formation.

   type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1a)

   Value	Definition
   alkali-granite (alaskite)
   amphibole schist
   amphibolite
   andesite
   argillite
   arkose
   augen gneiss
   basalt
   biotite gneiss
   breccia
   calc-silicate rock
   clay or mud
   conglomerate
   dacite
   diabase
   diorite
   dolostone (dolomite)
   felsic gneiss
   felsic metavolcanic rock
   gabbro
   gneiss
   granite
   granitic gneiss
   granodiorite
   granofels
   greenstone
   hornblendite
   limestone
   mafic gneiss
   mafic volcanic rock
   marble
   metabasalt
   metasedimentary rock
   metavolcanic rock
   mica schist
   monzodiorite
   monzonite
   mudstone
   mylonite
   paragneiss
   pegmatite
   pelitic schist
   peridotite
   phyllite
   porphyry
   quartz diorite
   quartz monzodiorite
   quartzite
   rhyolite
   sandstone
   schist
   sedimentary breccia
   sedimentary rock
   serpentinite
   slate
   syenite
   tectonic breccia
   tholeiite
   tonalite
   tuff
   ultramafic intrusive rock
   volcanic breccia (agglomerate)
   water

   rocktype2

   The second most predominant lithology in the formation.

   type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1)

   Value	Definition
   amphibole schist
   amphibolite
   andesite
   argillite
   arkose
   biotite gneiss
   breccia
   calc-silicate rock
   chert
   conglomerate
   diorite
   felsic gneiss
   gabbro
   gneiss
   granite
   granodiorite
   granofels
   graywacke
   greenstone
   hornblendite
   limestone
   mafic gneiss
   mafic volcanic rock
   marble
   metamorphic rock
   metasedimentary rock
   mica schist
   mixed clastic/volcanic
   mudstone
   norite
   pegmatite
   peridotite
   phyllite
   pyroxenite
   quartz diorite
   quartz syenite
   quartzite
   sandstone
   schist
   serpentinite
   silt
   siltstone
   slate
   tonalite
   trondhjemite
   tuff
   volcanic breccia (agglomerate)
   volcanic rock

   MA_geol.aat

   Arc attribute table for Massachusetts geologic coverage. (Source: ESRI)

   arc-code

   Unique identifier for the line feature

   type: integer width: 3 output width: 3 (Source: AAT data dictionary)

   Value	Definition
   1	contact, location certain
   4	normal fault, location certain, digitized with upthrown side on the right (code of 1 added to ARC-PARA1 where U/D is designated in source)
   6	normal fault, location inferred, queried, digitized with upthrown side on the right (code of 1 added to ARC-PARA1 where U/D is designated in source)
   7	shoreline or riverbank
   10	thrust fault, location certain, teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
   30	fault, sense of displacement unknown or undefined, location certain
   32	fault, sense of displacement unknown or undefined, location inferred or queried
   35	high-angle reverse fault, location certain, teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
   124	state boundary

   arc-para1

   Used for "decorated" lines where additional information is needed.

   type: integer width: 3 output width: 3 (Source: AAT data dictionary)

   Value	Definition
   0	no additional information
   1	U/D designated in source

   arc-para2

   "Scratch" field used mostly in Alaska.

   type: integer width: 3 output width: 3 (Source: AAT data dictionary)

   Value	Definition
   0	no additional information
   1	pre-meta thrust fault

   source

   An alphanumeric code (e.g. US001) that designates the source material used.

   type: character width: 6 output width: 8 (Source: Doug Stoeser (USGS))

   Value	Definition
   MA001	Unpublished digital map of Massachusetts (Rudi Hon at Boston College, 1998).
   MA101	Source arcs were mistagged and have been corrected by C.L. Dicken.
   MA102	Source arcs were in the wrong direction and have been “flipped” by C.L. Dicken.
   MA103	Source arcs were mistagged and in the wrong direction and have been corrected and flipped by C.L. Dicken.
   MA104	C.L.Dicken added one arc (polygon).
   MA201	Mistagged polygons were corrected by C.L. Dicken, so digital file now conforms to paper map.
   US001	Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationNENJ.pdf)

   Entity_and_Attribute_Overview:

   Coding for polygon attributes:

   NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province unit_link sgmc_label and a state code identifier source reference to source of data unit_age geologic age rocktype1 predominant lithology rocktype2 second most predominant lithology

   Coding for arc attributes:

   NAME: FEATURE: arc-code unique integer identifier arc-para1 used where additional information is needed arc-para2 scratch field source reference to source of data

   Coding for point attributes:

   NAME: FEATURE: point_feature name of feature on map source reference to source of data

   Coding for dikes (special arcs) attributes:

   NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province arc-code unique integer identifier dike_lith general lithology dike_age geologic age source reference to source of data

   Entity_and_Attribute_Detail_Citation: ESRI

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Suzanne W. Nicholson
   • Connie L. Dicken
   • John D. Horton
   • Michael P. Foose
   • Julia A.L. Mueller
   • Rudi Hon

2. Who also contributed to the data set?

   State Geologic Map Compilation (SGMC) activity of the National Surveys and Analysis projects of the US Geological Survey Mineral Resources Program.

3. To whom should users address questions about the data?
   Suzanne W. Nicholson
   U.S. Geological Survey
   12201 Sunrise Valley Dr. MS954
   Reston, VA 20192
   USA
   

   703-648-6344 (voice)
   swnich@usgs.gov
   

Why was the data set created?

A primary goal of this work is to develop geologic map datasets with standardized structure and attribution. The database design and standards are documented in CONUSdocumentationNENJ.pdf of this series. The intent is that contiguous databases can be merged seamlessly and without any additional effort. In addition to a common database structure, the conterminous U.S. state databases (the contiguous 48 states) have been fitted to a set of standard state boundaries so that, when states are merged, they match without slivers or overlap. No attempt has been made to reconcile differences in mapping across state boundaries.

How was the data set created?

1. From what previous works were the data drawn?

   mageol (source 1 of 3)

   Hon, Rudolph, unpublished material, Digital Geologic Map of Massachusetts: unknown, Boston College.

   Online Links:

   • none

   Type_of_Source_Media: vector

   Source_Scale_Denominator: 250,000

   Source_Contribution: provided geology for state map

   state boundaries (source 2 of 3)

   Johnson, Bruce R. , unpublished, 1:100,000 Scale State Boundaries of the Conterminous United States.

   Other_Citation_Details:

   Arc/INFO coverage developed by Bruce Johnson. Derived from USGS 100,000-scale DLG boundary layer quadrangles.

   Type_of_Source_Media: online

   Source_Scale_Denominator: 100,000

   Source_Contribution: provided linework of the conterminous state boundaries

   lithclass (source 3 of 3)

   Johnson, Bruce R. , unpublished, Geologic Map Unit Classification, ver. 6.1.

   Other_Citation_Details:

   Document has been modified and is included in Appedices of the publication.

   Type_of_Source_Media: online; http:/geology.usgs.gov/dm

   Source_Scale_Denominator: none

   Source_Contribution:

   Source of lithologic codes and specific rock names found in ROCKTYPE1 and ROCKTYPE2.

2. How were the data generated, processed, and modified?

   Date: 2003 (process 1 of 10)

   The purpose of this standardization is to allow all SGMC covers to be seamlessly joined without any additional effort to form regional or national level digital maps. Note that for Alaska, the state is being compiled as blocks of 1:250k quadrangles that will ultimately be used to compile a new state map. Douglas Stoeser (USGS) and Ric Wilson (USGS) are co-coordinators for the overall SGMC effort, with Stoeser coordinating work on the mainland states and Wilson coordinating work for Alaska and Hawaii.

   Date: 2006 (process 2 of 10)

   C.L. Dicken obtained the digital geologic map of Massachusetts from Julia Mueller. The coverage was re-projected into the following:

   projection: Lambert Conformal Conic units: meters datum: NAD27 standard parallel 1: 33 0 0.000 standard parallel 2: 45 0 0.000 central meridian: -100 0 0.000 reference latitude: 0 0 0.000 false easting: 0.00000 false northing: 0.00000

   (Note: Attributes associated with the generation of the coverages were not deleted. PAT - shape, area, perimeter, coverage#, and coverage-id AAT - shape, fnode#, tnode#, lnode#, rnode#, length, coverage#, and coverage-id)

   All attributes were deleted except map_code. The values from map_code where then calculated into a new field called orig_label.

   Date: 2006 (process 3 of 10)

   The relevant state outline (arcs) was removed from the coverage and replaced with the arcs from the 1:100,000 Scale State Boundaries of the Conterminous United States.

   This allows for a seamless fit of each state to a standard state boundary base.

   Date: 2005 (process 4 of 10)

   The following attributes were exported from Filemaker as a .dbf: orig_label, map_symbol2, unit_link, reference_id, unit_age, rocktype1, and rocktype2.

   orig_label reflects the original map symbol used on the source map

   map_symbol2 reflects map-symbol1 with the addition of a province number

   unit_link is an auto generated field based on map-symbol2 and the state abbreviation (e.g. MA001) that produces a unique identifier for each map unit

   reference_id was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework and other references used to describe the age or lithologies of the unit.

   unit_age was populated with general age assignment

   rocktype1 records dominant lithology (does not imply minimum percentage of abundance), using standardized data dictionary

   rocktype2 records second most dominant lithology, using standardized data dictionary

   The attributes were then converted using the following structure:

   item name: orig_label width: 12 output: 12 type: c

   item name: sgmc_label width: 16 output: 16 type: c

   item name: unit_link width: 18 output: 18 type: c

   item name: source width: 6 output: 8 type: c

   item name: unit_age width: 60 output: 60 type: c

   item name: rocktype1 width: 40 output: 40 type: c

   item name: rocktype2 width: 40 output: 40 type: c

   Date: 2006 (process 5 of 10)

   Once the .dbf was in the correct format with standardized column widths and data structure, it was converted into a lookup table (.lut) in Arc/Info. Then a joinitem was performed to join the look-up table to the polygon attribute table. orig_label was used as the merge item.

   Date: 2006 (process 6 of 10)

   Next, in preparing the uniform .aat file, the following items were added to the table:

   item name: arc-code width: 3 output: 3 type: i

   item name: arc-para1 width: 3 output: 3 type: i

   item name: arc-para2 width: 3 output: 3 type: i

   item name: source width: 6 output: 8 type: c

   Date: 2006 (process 7 of 10)

   Arc-code was populated using the paper map source to tag the lines using the AAT line type data dictionary (see CONUSdocumentationNENJ.pdf in this series).

   Arc-para1 was populated when additional information was available such as identifying the upthrown side of a fault or direction of thrusting on a fault. (see CONUSdocumentationNENJ.pdf)

   Arc-para2 is a scratch field that is used mostly in Alaska.

   Source was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework.

   (process 8 of 10)

   Once the .aat and the .pat were populated with the correct attributes, the coverage was exported as an .e00 file (MAgeol_lcc.e00).

   Then it was unprojected into geographic coordinates and exported again (MAgeol_dd.e00).

   Date: 2006 (process 9 of 10)

   Faults were extracted from the coverage and created a separate fault coverage (MAfaults_lcc) and then exported (MAfaults_lcc.e00). File was unprojected into geographic coordinates (MAfaults_dd) and exported again (MAfaults_dd.e00).

   Date: 2006 (process 10 of 10)

   Finally, the geology lines, geology polygons, and faults were converted into shapefiles; in both geographic coordinates and in Lambert Conformal Conic projection.

3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

   The values of the attributes ROCKTYPE1 and ROCKTYPE2 were assigned based on the information in the legends of the source maps (most of which are paper). The definitions of these values are described in the draft document Geologic Map Classification version 6.1 (Johnson and others); available at the following website: <http://geology.usgs.gov/dm>

2. How accurate are the geographic locations?

   Accuracy of Massachusetts state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100,000 scale original data used to produce this boundary. (Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationNENJ.pdf))

   Those internal arcs intersecting the state boundary were extended or shortened as needed to complete polygons, possibly creating a small amount of error.

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   Bodies of water are classified as water, and the geologic units underlying them are not included in this coverage.

5. How consistent are the relationships among the observations, including topology?

   All internal polygons were checked for closure with vendor software and on hard copy plots. Overshoots and undershoots have been deleted or corrected as appropriate.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none

Use_Constraints:

This database is not meant to be used or displayed at any scale other than 1:500,000.

Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey.

1. Who distributes the data set? (Distributor 1 of 1)
   U.S. Geological Survey Information Services Reston-ESIC
   U.S. Geological Survey
   507 National Center
   Reston, Virginia 20192
   USA
   

   1-888-ASK-USGS or 1-703-648-5953 (voice)
   <http://www.usgs.gov/contact/>
   

2. What's the catalog number I need to order this data set?

3. What legal disclaimers am I supposed to read?

   Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the USGS. Although these data have been used by the USGS and have been successfully imported into data base programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. This data base GIS is not meant to be used or displayed at any scale other than 1:500,000.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Geologic units and structural features in format ARC/INFO export (version 9.0)
     Network links:	<http://pubs.usgs.gov/of/2006/1272/>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 03-Apr-2006

Metadata author:

U.S. Geological Survey
c/o Connie L. Dicken
12201 Sunrise Valley Dr. MS954
Reston, VA 20192
USA

703-648-6482 (voice)
cdicken@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)