TY - DATA T1 - National Geologic Map Database Y1 - 0 KW - #BedrockMaps KW - #SurficialMaps KW - bedrock geology KW - geologic maps KW - map KW - surficial geology AB -

This database houses almost all geologic maps produced by the USGS, and links to almost all maps published by state geologic surveys, including the MGS.

Searching by placename is currenty disabled, but an interactive web-map interface to the NGMDB can be found here:

http://mrdata.usgs.gov/geology/state/map.html?x=-71.8089194224132&y=42.2562234015901&z=8


It is also recommended you find the name of the USGS 7.5' topographic quadrangle your town is in by looking at the DEP Hydrogeologic Information Matrix, and searching the database for that. It is also very useful to search the USGS Publication Warehouse as well for the quadrangle you want.

PB - United States Geological Survey, Association of American State Geologists UR - http://ngmdb.usgs.gov ER - TY - MAP T1 - Bedrock geologic map of the Marlborough quadrangle, Massachusetts Y1 - 2004 A1 - Joseph P Kopera A1 - DiNitto, R.G. A1 - Hepburn, J.C. KW - #BedrockMaps KW - #MGSPub KW - alaskite KW - amphibolite KW - Andover Granite KW - Ashland KW - Berlin KW - Bloody Bluff KW - Burlington Mylonite Zone KW - epidote KW - fault zone KW - gneiss KW - granite KW - granofels KW - Hope Valley Alaskite KW - Hopkinton KW - Hudson KW - Indian Head Hill KW - Lake Char KW - Malborough KW - Milford granite KW - Milham Reservoir KW - mylonite KW - Northborough KW - quartzite KW - schist KW - shear zone KW - Southborough KW - volcanic KW - Waltham Tectonic Melange KW - Westborough KW - Wolfpen Lens JF - geologic Map PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - Bedrock geologic map of the Newton 7.5’ quadrangle, Middlesex, Norfolk and Suffolk counties, Massachusetts Y1 - 0 A1 - Thompson, Margaret D. KW - #BedrockMaps KW - #MGSPub KW - argillite KW - Boston KW - Boston Basin KW - Cambridge KW - faults KW - Lynn KW - Mattapan KW - Middlesex Fells KW - Newton KW - Roxbury KW - volcanics AB -

The Newton quadrangle, located west of Boston, Massachusetts, is mainly underlain by clastic sedimentary and minor igneous rocks occupying the topographic Boston Basin (Crosby, 1880; Emerson, 1917; LaForge, 1932; Billings, 1976 and references therein). Fault blocks dominated by older plutonic and volcanic rocks truncate the Basin sequence on the west and south. Although fossiliferous Cambrian strata overlying plutonic basement had been reported some 30 miles away in North Attleboro, MA (Billings, 1929), the first quadrangle map including the Newton area (1:62,500 Plate I of LaForge, 1932) portrayed the plutonic units as “Early Paleozoic” and assigned all the others to the Devonian or Carboniferous periods. By the time the Newton quadrangle appeared at 1:24,000 scale (Kaye, 1980), emerging U-Pb zircon geochronology had revealed Neoproterozoic (Ediacaran in timescale of Gradstein et al., 2012) crystallization ages both for the Mattapan Volcanic Complex and the Dedham Granite on the south side of the map area (Kaye and Zartman, 1980; written communication of Zartman and Naylor, 1980 not published until 1984). The Boston Basin sequence in this map was inferred to be Neoproterozoic in the absence of a break with overlying Cambrian strata (Kaye and Zartman, 1980), an interpretation confirmed shortly thereafter by the discovery of Ediacaran microfossils in the top portion of the sedimentary section (“Vendian” in Lenk et al., 1982). In the map presented here, U-Pb zircon dates obtained by the author over twenty years with colleagues at MIT’s Radiogenic Isotope Lab constrain all map units except mafic dikes. During this interval, U-Pb analyses have become more precise and accurate, leading also to significant refinements to the dates used by Kaye in 1980, as discussed further in the section on Stratigraphy. 

JF - Geologic Map PB - Massachusetts Geological Survey ER - TY - MAP T1 - [Digital Conversion] Bedrock geologic map of the Gloucester and Rockport quadrangles, Massachusetts Y1 - 2007 A1 - Dennen W. A1 - Fernandez M. KW - #BedrockMaps KW - #MGSPub KW - Cape Anne granite KW - Essex KW - Gloucester KW - granite KW - Ipswich KW - Manchester KW - MGS Publication KW - pluton KW - quarry KW - Rockport AB -

Digitized version of U.S. Geological Survey Miscellaneous Investigations Series Map I-2285

JF - Digital Conversion PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - [Draft] Preliminary bedrock geologic map of the Lawrence quadrangle, Massachusetts Y1 - 2005 A1 - Castle, R.O. A1 - Hepburn, J.C. A1 - Joseph P Kopera KW - #BedrockMaps KW - #MGSPub KW - Andover KW - Andover Granite KW - Bedford KW - Berwick formation KW - Clinton-Newbury Fault KW - Dracut KW - Elliot formation KW - Lawrence KW - Methuen KW - nashoba KW - North Andover KW - tadmuck brook schist KW - Tewksbury JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - [Draft] Preliminary bedrock geologic map of the Oxford quadrangle, Worcester County, Massachusetts, Providence County, Rhode Island and Windam County, Connecticut Y1 - 2005 A1 - Patrick J Barosh KW - #BedrockMaps KW - #MGSPub KW - Bloody Bluff KW - Douglas KW - faults KW - gneiss KW - granite KW - Lake Char KW - Marlborough Formation KW - Nashoba Formation KW - Nashua Trough KW - Northbridge granite gneiss KW - Oxford KW - Sutton KW - Webster JF - Open File Report PB - Massachusetts Geological Survey U1 -

GIS and metadata are forthcoming

U2 -

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ER - TY - MAP T1 - [Draft] Preliminary bedrock geologic map of the South Groveland quadrangle, Massachusetts Y1 - 2005 A1 - Castle, R.O. A1 - Hepburn, J.C. A1 - Joseph P Kopera KW - #BedrockMaps KW - #MGSPub KW - Andover KW - Andover Granite KW - Boxford KW - Boxford formation KW - Clinton-Newbury Fault KW - Fish Brook gneiss KW - Georgetown KW - Groveland KW - Haverhill KW - Methuen KW - Middleton KW - Nashoba terrane KW - North Andover KW - Sharpner's Pond diorite JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - [Draft] Preliminary bedrock geologic map of the Wilmington quadrangle, Massachusetts Y1 - 2005 A1 - Castle, R.O. A1 - Hepburn, J.C. A1 - Joseph P Kopera KW - #BedrockMaps KW - #MGSPub KW - Andover KW - Andover Granite KW - Assabet River Fault KW - Bedford KW - Billerica KW - Billerica Schist KW - Boxford formation KW - Burlington KW - Burlington Mylonite Zone KW - Fish Brook gneiss KW - nashoba KW - North Reading KW - Reading KW - Spencer Brook Fault KW - Tewksbury KW - Waltham Tectonic Melange KW - Wilmington KW - Woburn JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - [Draft]Preliminary bedrock geologic map of the Reading quadrangle, Massachusetts Y1 - 2005 A1 - Castle, R.O. A1 - Hepburn, J.C. A1 - Joseph P Kopera KW - #BedrockMaps KW - #MGSPub KW - Andover KW - Bloody Bluff Fault KW - Boxford formation KW - Burlington Mylonite Zone KW - Danvers KW - Fish Brook gneiss KW - Lynn KW - Lynnfield KW - Middleton KW - Nashoba terrane KW - North Andover KW - North Reading KW - Peabody KW - Peabody Granite KW - Reading KW - Sharpner's Pond diorite KW - Stoneham KW - Wakefield KW - Waltham Tectonic Melange KW - Woburn JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - Preliminary Bedrock Geologic Map of the area surrounding Shepley's Hill, Towns of Ayer and Devens, Massachusetts Y1 - 2008 A1 - Joseph P Kopera KW - #BedrockMaps KW - #MGSPub KW - army KW - arsenic KW - Ayer KW - ayer granite KW - chelmsford granite KW - Clinton Newbury Fault Zone KW - Devens KW - landfill JF - Open-File Report PB - Massachusetts Geological Survey U2 -

1:12000

ER - TY - MAP T1 - Preliminary bedrock geologic map of the Ayer quadrangle, Massachusetts Y1 - 2006 A1 - Joseph P Kopera KW - #BedrockMaps KW - #MGSPub KW - arsenic KW - Ayer KW - ayer granite KW - Berwick formation KW - Boxborough KW - chelmsford granite KW - Clinton-Newbury Fault KW - Devens KW - Fort Devens KW - Groton KW - Harvard KW - Jahns KW - LITTLETON KW - Merrimack Terrane KW - mylonite KW - nashoba KW - Nashua Trough KW - Oakdale formation KW - Shepley's Hill Landfill KW - Shirley KW - tadmuck brook schist KW - Worcester Formation AB -

This preliminary version of the Bedrock Map of the Ayer Quadrangle (Kopera, 2006) has been removed pending the release of an updated version in the near future. The above version should be considered outdated. If you would like a copy of this map, please contact Joseph Kopera at jkopera[at]geo[dot]geo[dot] umass[dot]edu

JF - Open-File Report PB - Massachusetts Geological Survey UR - http://www.geo.umass.edu/stategeologist/ U2 -

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ER - TY - MAP T1 - Preliminary Bedrock Geologic Map of the Hudson 7.5' Quadrangle Worcester and Middlesex Counties, Massachusetts Y1 - 2014 A1 - Joseph P Kopera A1 - W.R. Hansen KW - #BedrockMaps KW - #MGSPub KW - acton granite KW - ayer granite KW - Berlin KW - Bolton KW - Boxborough KW - Clinton-Newbury Fault KW - gneiss KW - Harvard KW - Harvard Conglomerate KW - Hudson KW - magnetite KW - Malborough KW - marble KW - migmatite KW - nashoba KW - Stow KW - tadmuck brook schist KW - Vaughn Hills AB - The Hudson quadrangle straddles the Clinton-Newbury Fault Zone (CNFZ), which separates low metamorphic grade Silurian turbiditic metasediments and Devonian plutons of the Nashua sub-belt (Robinson and Goldsmith, 1991) of the Merrimack Terrane to the northwest from the high-grade, migmatitic Cambro- Ordovician arc-complex of the Nashoba Terrane (Walsh et al., 2011; Loan 2011). This general area comprises the suture between the Gander and Avalon composite terranes of the Northern Appalachians (cf. Hibbard et al., 2006). Metasedimentary rocks of the Merrimack Terrane are generally poorly exposed, with intrusives (Day, Dayp, SDgdt) and the Clinton-Newbury Fault zone and associated rocks (Ot) forming a prominent northeast trending ridge (Oak Hill in the town of Harvard) marking the eastern bordering slope of the Worcester Plateau (Emerson, 1917, p. 16). Elevation and local topographic relief gradually decreases and glacial cover increases to the east-southeast across the strike of the Nashoba Formation, which, locally, forms low-relief NE-trending strike-parallel ridges. These are cut by dramatic cross-strike cliffs and glacial spillway gorges developed along cross-strike joints and brittle faults, most notably on the western slopes of Rattlesnake Hill, southern slope of Powder House Hill and in Camp Resolute in Bolton in the west-central portion of the quadrangle, and the southern slope of the hill along the west side of Codman Hill Road in Harvard in the north-central portion of the quadrangle. The migmatitic ortho- and paragneisses, schists and associated metavolcanic rocks of the Nashoba Formation (_Sn) form a northeast striking belt underlying the southern two-thirds of the quadrangle. These are intruded by a variety of presumed Ordovician to Silurian intermediate intrusives (OSd, OSaqd) and Devonian or younger tonalites to granites (Dan, Danp, Dac). JF - Open File Report PB - Massachusetts Geological Survey U1 - Note: This map supersedes "Preliminary bedrock geologic map of the Hudson quadrangle, Massachusetts", MGS map published in 2005 Report accompanies map-- be sure to download both! ER - TY - MAP T1 - Preliminary bedrock geologic map of the Hudson quadrangle, Massachusetts Y1 - 2005 A1 - Joseph P Kopera A1 - Hansen, W.R. KW - #BedrockMaps KW - #MGSPub KW - acton granite KW - ayer granite KW - Berlin KW - Bolton KW - Boxborough KW - Clinton-Newbury Fault KW - gneiss KW - Harvard KW - Harvard Conglomerate KW - Hudson KW - magnetite KW - Malborough KW - marble KW - migmatite KW - nashoba KW - Stow KW - tadmuck brook schist KW - Vaughn Hills AB - This map has been superseded by MGS OFR 14-01: Preliminary Bedrock Geologic Map of the Hudson 7.5' Quadrangle Worcester and Middlesex Counties, Massachusetts This map is an interim update to W.R. Hansen's 1956 Bedrock Geology of the Hudson and Maynard 7.5' quadrangles (USGS Bulletin 1038). This draft version of the Bedrock Map of the Hudson Quadrangle (Kopera, 2005) has been removed pending the future release of an updated version. The above version should be considered outdated. If you would like a copy of this map, please contact Joseph Kopera at jkopera[at]geo[dot]geo[dot]umass[dot]edu

JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - Preliminary bedrock geologic Map of the Milford quadrangle Y1 - 2007 A1 - Joseph P Kopera A1 - Shaw, C.E. A1 - Fernandez, M. KW - #BedrockMaps KW - #FractureMaps KW - #MGSPub KW - acadian KW - alaskite KW - alleghenian KW - amphibolite KW - antiform KW - Ashland KW - avalon KW - bedrock map KW - blackstone KW - fracture KW - GEOLOGIC MAP KW - gneiss KW - granite KW - Holliston KW - hopedale quartzite KW - Hopkinton KW - ironstone diorite KW - joints KW - l-tectonite KW - Mendon KW - MGS Publication KW - Milford KW - neoproterozoic KW - Northbridge KW - proterozoic KW - quarries KW - quartzite KW - Upton KW - Westborough AB -

Fracture Characterization Map is included as sheets 2 and 3. Water Resources data included as sheet 4.

GIS and metadata forthcoming

JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - Preliminary bedrock geologic map of the Orange 7.5' quadrangle, Massachusetts (including portions of the Millers Falls and Athol 7.5' quadrangles) Y1 - 2008 A1 - Robinson, P. A1 - Fernandez, M. KW - #BedrockMaps KW - #MGSPub KW - AMMONOOSUC KW - Athol KW - ATHOL FAULT KW - BEARS DEN FAULT KW - BEDROCK KW - BRONSON HILL KW - ERVING KW - GEOLOGIC MAP KW - GEOLOGY KW - LITTLETON KW - map KW - METAMORPHIC KW - MGS Publication KW - New Salem KW - Orange KW - PELHAM DOME KW - Petersham KW - Shutesbury KW - Warwick KW - Wendell AB - The culmination of over 50 years of mapping and geologic investigation by U-Mass professor Peter Robinson and his students, this map details the structure and stratigraphy of the Oliverean gneiss domes and the continuation of the Bronson Hill sequence south into central Massachusetts. JF - Open File Report PB - Massachusetts Geological Survey CY - Amherst, MA U2 -

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ER - TY - MAP T1 - Preliminary bedrock geologic Map of the Palmer quadrangle, Massachusetts Y1 - 2008 A1 - Matthew A Massey KW - #BedrockMaps KW - #MGSPub KW - AMMONOOSUC KW - Belchertown KW - Belchertown pluton KW - Brimfield KW - Clough KW - Monson KW - Palmer KW - Ware KW - Warren JF - Open-File Report PB - Massachusetts Geological Survey U1 -

GIS and metadata forthcoming.

U2 -

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ER - TY - MAP T1 - Preliminary bedrock geologic Map of the Webster quadrangle, Massachusetts Y1 - 2009 A1 - Patrick J Barosh KW - #BedrockMaps KW - #MGSPub KW - ayer granite KW - Charlton KW - Dudley KW - Eastford granite KW - Nashua Trough KW - Oakdale Quartzite KW - Oxford KW - Paxton Formation KW - Paxton Group KW - Plainville KW - Plainville Formation KW - Southbridge KW - Webster KW - Worcester Formation JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - Preliminary bedrock geologic map of the Westford quadrangle, Massachusetts Y1 - 2009 A1 - Joseph P Kopera A1 - D.C. Alvord A1 - Richard H Jahns A1 - M.E. Willard A1 - W.S. White KW - #BedrockMaps KW - #MGSPub KW - Acton KW - amphibolite KW - ayer granite KW - Berwick formation KW - Boxborough KW - calc-silicates KW - Carlisle KW - Chelmsford KW - chelmsford granite KW - Clinton-Newbury Fault KW - Concord KW - diorite KW - gneiss KW - Groton KW - LITTLETON KW - magnetite KW - marble KW - migmatite KW - Nashoba Formation KW - phyllonite KW - tadmuck brook schist KW - Tyngsborough KW - Westford AB - Bedrock Geologic Map contains brittle fracture data Mapping still in progress. For interim fracture database, please contact Joe Kopera JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - Preliminary bedrock Geology of the Northern Portion of the Blackstone quadrangle, Massachusetts Y1 - 2008 A1 - Joseph P Kopera A1 - Shaw, C.J. KW - #BedrockMaps KW - #MGSPub KW - acadian KW - alleghenian KW - avalon KW - bedrock map KW - Bellingham KW - blackstone KW - GEOLOGIC MAP KW - gneiss KW - granite KW - hopedale quartzite KW - ironstone diorite KW - Mendon KW - MGS Publication KW - Milford KW - Millville KW - neoproterozoic KW - Northbridge KW - proterozoic KW - quarries KW - Upton KW - Uxbridge AB -

This map is an interim progress report of mapping currently underway.

JF - Open-File Report PB - Massachusetts Geological Survey UR - http://www.geo.umass.edu/stategeologist/ U2 -

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ER - TY - MAP T1 - Progress map of the preliminary bedrock geologic map of the Billerica quadrangle, Massachusetts Y1 - 2011 A1 - Matthew A Massey KW - #BedrockMaps KW - #FractureMaps KW - #MGSPub KW - Bedford KW - Berwick formation KW - Billerica KW - Billerica Schist KW - Boxford formation KW - Carlisle KW - Chelmsford KW - Clinton-Newbury Fault Zone KW - Concord KW - fracture KW - gneiss KW - joints KW - Lowell KW - magnetite KW - migmatite KW - nashoba KW - schist KW - Spencer Brook Fault KW - tadmuck brook schist KW - Tewksbury AB - This map also contains brittle fracture data as part of the GIS files. This map is a progress report of bedrock geologic mapping currently underway in the Billerica quadrangle. It is a compilation of ongoing field mapping (Massey, this study) and previously published work in the area (Alvord, 1973, 1975; Jahns et al.1959). The Billerica quadrangle is located approximately 20 miles northwest of Boston along Route 3, just south of Lowell, in northeastern Massachusetts, encompassing the northwestern most Nashoba terrane and it’s boundary with the Merrimack belt (Figure 1). In the Billerica quadrangle, the Merrimack Belt consists of limited exposures of highly strained metasediments, or possibly orthoschist derived from reconstituted igne- ous protolith. The Clinton-Newbury fault zone separates the Merrimack Belt from multiply deformed, polymetamorphic biotite gneisses, migmatites, and amphibolites of the Nashoba terrane. PB - Massachusetts Geological Survey U2 - 1:24000 ER - TY - MAP T1 - Progress report of bedrock geologic mapping of the Lowell quadrangle, Massachusetts Y1 - 2010 A1 - Richard H Jahns A1 - Joseph P Kopera KW - #BedrockMaps KW - #MGSPub KW - Berwick formation KW - Chelmsford KW - Clinton-Newbury Fault KW - Dracut KW - Dracut diorite KW - Dracut gabbro KW - Dracut pluton KW - gabbro KW - Jahns KW - Lowell KW - Methuen KW - nashoba KW - Nashoba Formation KW - Tewksbury KW - Tyngsborough AB -

Maps in Progress are not distributed to the public. If you would like to see a copy of this map, please contact Joseph Kopera at jkopera[at]geo[dot]geo[dot]umass[dot]edu

JF - Progress Map PB - Massachusetts Geological Survey U2 -

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ER - TY - Generic T1 - The Massachusetts DEP Hydrogeologic Information Matrix Y1 - 0 KW - #BedrockMaps KW - #Hydro KW - #MapDatabase KW - #MapsDataPublications KW - #QuadIndex KW - #SurficialMaps KW - aquifer KW - catalog KW - data KW - database KW - GEOLOGIC MAP KW - ground source heat pumps KW - groundwater KW - hydrogeology KW - index KW - maps KW - quadrangles KW - water resources AB - An index of all USGS geologic maps and hydrogeologic publications for Massachusetts, cross-referenced and indexed by town and 7.5' quadrangle. This is an extremely valuable resource for finding geologic data for a given site. PB - MassDEP UR - http://www.mass.gov/eea/docs/dep/water/compliance/hydromat.pdf ER - TY - Generic T1 - U-Mass Geoscience Contribution Series Y1 - 1978 KW - #BedrockMap KW - #BedrockMaps KW - #ConnecticutValley KW - #Fieldtrips KW - #UMGeoPubs AB - For several decades the Department of Geology and Geography at UMass Amherst published student theses, fieldtrip guidebooks, etc..., as affordable bound paper volumes. These publications represent some of the only geologic maps and data available for many parts of the Commonwealth. This links to a list of these publications, now available via PDF, maintained by the Dept. of Geosciences at U-Mass Amherst. For paper copies, please contact the department office. JF - U-Mass Geoscience Publication Series PB - Dept. of Geosciences, University of Massachusetts, Amherst UR - http://www.geo.umass.edu/research/list.html ER - TY - Generic T1 - The U-Mass Geosciences publication series Y1 - KW - #BedrockMaps KW - #LegacyPublications KW - #MapsDataPublications KW - BEDROCK KW - GEOLOGY KW - maps KW - massachusetts KW - theses KW - U- Mass AB - A series of publications on Massachusetts geology based on Master's and PhD theses by U-Mass students from the 1960s-1990s. These are a valuable resource and the only geologic data for many areas. ***Note: This list needs to be re-built in the biblio database and have its own page off of MGS website– it's no longer online. PB - U-Mass Amherst Dept. of Geosciences UR - http://www.geo.umass.edu/dept_info/contrib_series/list.html ER -