%0 Map %D 2008 %T Preliminary Bedrock Geologic Map of the area surrounding Shepley's Hill, Towns of Ayer and Devens, Massachusetts %A Joseph P Kopera %K #BedrockMaps %K #MGSPub %K army %K arsenic %K Ayer %K ayer granite %K chelmsford granite %K Clinton Newbury Fault Zone %K Devens %K landfill %B Open-File Report %7 OFR08-05 %I Massachusetts Geological Survey %G eng %2

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%0 Map %D 2006 %T Preliminary bedrock geologic map of the Ayer quadrangle, Massachusetts %A Joseph P Kopera %K #BedrockMaps %K #MGSPub %K arsenic %K Ayer %K ayer granite %K Berwick formation %K Boxborough %K chelmsford granite %K Clinton-Newbury Fault %K Devens %K Fort Devens %K Groton %K Harvard %K Jahns %K LITTLETON %K Merrimack Terrane %K mylonite %K nashoba %K Nashua Trough %K Oakdale formation %K Shepley's Hill Landfill %K Shirley %K tadmuck brook schist %K Worcester Formation %X

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 The above version should be considered outdated.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

%B Open-File Report %7 OFR-06-02 %I Massachusetts Geological Survey %G eng %U http://www.geo.umass.edu/stategeologist/ %2

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%0 Map %D 2014 %T Preliminary Bedrock Geologic Map of the Hudson 7.5' Quadrangle Worcester and Middlesex Counties, Massachusetts %A Joseph P Kopera %A W.R. Hansen %K #BedrockMaps %K #MGSPub %K acton granite %K ayer granite %K Berlin %K Bolton %K Boxborough %K Clinton-Newbury Fault %K gneiss %K Harvard %K Harvard Conglomerate %K Hudson %K magnetite %K Malborough %K marble %K migmatite %K nashoba %K Stow %K tadmuck brook schist %K Vaughn Hills %X 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). %B Open File Report %7 14-01 %I Massachusetts Geological Survey %8 09/2014 %G eng %1 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! %0 Map %D 2005 %T Preliminary bedrock geologic map of the Hudson quadrangle, Massachusetts %A Joseph P Kopera %A Hansen, W.R. %K #BedrockMaps %K #MGSPub %K acton granite %K ayer granite %K Berlin %K Bolton %K Boxborough %K Clinton-Newbury Fault %K gneiss %K Harvard %K Harvard Conglomerate %K Hudson %K magnetite %K Malborough %K marble %K migmatite %K nashoba %K Stow %K tadmuck brook schist %K Vaughn Hills %X 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

%B Open-File Report %I Massachusetts Geological Survey %G eng %2

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

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

GIS and metadata forthcoming

%B Open-File Report %7 OFR-07-01 %I Massachusetts Geological Survey %G eng %2

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%0 Map %D 2009 %T Preliminary bedrock geologic map of the Westford quadrangle, Massachusetts %A Joseph P Kopera %A D.C. Alvord %A Richard H Jahns %A M.E. Willard %A W.S. White %K #BedrockMaps %K #MGSPub %K Acton %K amphibolite %K ayer granite %K Berwick formation %K Boxborough %K calc-silicates %K Carlisle %K Chelmsford %K chelmsford granite %K Clinton-Newbury Fault %K Concord %K diorite %K gneiss %K Groton %K LITTLETON %K magnetite %K marble %K migmatite %K Nashoba Formation %K phyllonite %K tadmuck brook schist %K Tyngsborough %K Westford %X Bedrock Geologic Map contains brittle fracture data Mapping still in progress. For interim fracture database, please contact Joe Kopera %B Open-File Report %7 OFR-09-01 %I Massachusetts Geological Survey %G eng %2

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%0 Map %D 2008 %T Preliminary bedrock Geology of the Northern Portion of the Blackstone quadrangle, Massachusetts %A Joseph P Kopera %A Shaw, C.J. %K #BedrockMaps %K #MGSPub %K acadian %K alleghenian %K avalon %K bedrock map %K Bellingham %K blackstone %K GEOLOGIC MAP %K gneiss %K granite %K hopedale quartzite %K ironstone diorite %K Mendon %K MGS Publication %K Milford %K Millville %K neoproterozoic %K Northbridge %K proterozoic %K quarries %K Upton %K Uxbridge %X

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

%B Open-File Report %7 OFR-08-03 %I Massachusetts Geological Survey %G eng %U http://www.geo.umass.edu/stategeologist/ %2

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%0 Map %D 2006 %T Preliminary fracture characterization map of the Ayer quadrangle, Massachusetts %A Joseph P Kopera %A Stephen B Mabee %A Powers, D.C. %K #FractureMaps %K #MGSPub %K Ayer %K ayer granite %K Boxborough %K chelmsford granite %K Devens %K fault %K Fort Devens %K fracture %K fracture trace %K Groton %K Harvard %K hydrostructural domain %K joint %K lineament %K LITTLETON %K Shirley %K water resources %X This preliminary version of the Fracture Characterization Map of the Ayer Quadrangle (Kopera, 2006) has been removed pending the release of an updated version of the underlying bedrock geologic map in the near future. The above version should be considered outdated. If you would like a copy of the outdated map, please contact Joseph Kopera at jkopera[at]geo[dot]geo[dot]umass[dot]edu %B Open-File Report %7 OFR-06-03 %I Massachusetts Geological Survey %G eng %2

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%0 Map %D 2010 %T Progress report of bedrock geologic mapping of the Lowell quadrangle, Massachusetts %A Richard H Jahns %A Joseph P Kopera %K #BedrockMaps %K #MGSPub %K Berwick formation %K Chelmsford %K Clinton-Newbury Fault %K Dracut %K Dracut diorite %K Dracut gabbro %K Dracut pluton %K gabbro %K Jahns %K Lowell %K Methuen %K nashoba %K Nashoba Formation %K Tewksbury %K Tyngsborough %X

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

%B Progress Map %7 PM-09-01 %I Massachusetts Geological Survey %G eng %2

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%0 Report %D 2011 %T Preliminary field report on the November 13th-14th, 2011 landslide near Steam Mill Road, Deerfield, Massachusetts %A Joseph P Kopera %A Stephen B Mabee %K #Deerfield %K #Landslides %K #MGSPub %K #NaturalHazards %K #Reports %K flooding %K hazards %K Irene %K landslide %K mudslide %K natural hazards %K swamp %X On November 13th and 14th, 2011, residents and business owners in the area of Wapping Road in Deerfield, Massachusetts, began to notice light-gray, clay-rich mud appearing in the streams and wetlands east of State Route 5/10. The mud quickly clogged culverts under Wapping Road, Route 5/10, and the Pan Am Southern Railway tracks, partially filled in wetlands on both sides of Route 5/10, and partially filled in drainage ditches upgradient of these wetlands. This resulted in localized flooding of property along the east side of Route 5/10. Prepared for the Deerfield Board of Selectman and Board of Public Health 19 pages. A NEPR radio interview with Joe Kopera about the landslide can be found at http://nepr.net/news/2011/12/02/fallout-2011s-extreme-weather-landslides-ice-jams/. %B Open File Report %I Massachusetts Geological Survey %P 19 %G eng %U http://www.geo.umass.edu/stategeologist/Products/reports/Deerfield_LS_Report_final.pdf %0 Report %D 2011 %T Preliminary field report on the Route 2 landslides of tropical storm Irene, August 28, 2011 %A Stephen B Mabee %A Joseph P Kopera %K #Landslides %K #MGSPub %K #NaturalHazards %K #Reports %K Cold River %K hazards %K Irene %K landslide %K Mohawk State Forest %K natural hazards %K Rt 2 %K Savoy %X The Massachusetts Geological Survey accompanied Massachusetts Department of Transportation personnel in the field on Tuesday, September 6, 2011, to observe the landslide and flooding damage along the Route 2 corridor caused by Hurricane, which struck the area on August 28, 2011. The purpose of the visit was to: 1) identify the type of slides that occurred; 2) estimate the dimensions and volume of material moved; 2) estimate the geological and environmental conditions leading to the slope failures; and, 4) determine the propensity for future occurrence. Four landslides were observed. Slide 1 is immediately east of the confluence of Trout Brook with the Cold River and Slides 2, 3, and 4 are clustered together on a north- facing slope about 1850 feet east of the confluence of Black Brook with the Cold River. Report prepared for Massachusetts Department of Transportation. %I Massachusetts Geological Survey %P 18 %G eng %U http://www.geo.umass.edu/stategeologist/Products/reports/Rt2_Irene_FieldReport.pdf