TY - MAP T1 - Bedrock geologic map of the Ayer 7.5’ quadrangle, Worcester and Middlesex Counties, Massachusetts (2015) Y1 - 0 A1 - Joseph P Kopera KW - Ayer KW - ayer granite KW - Ayer Granodiorite KW - Ayer Quadrangle KW - Berwick KW - Campbell Hill Fault KW - chelmsford granite KW - Clinton Newbury Fault KW - Devens KW - Harvard Conglomerate KW - merrimack KW - Oakdale formation KW - pin hill KW - Shepley's Hill KW - Shirley Fault KW - tadmuck brook schist KW - Worcester Formation AB -

Editing and review are still underway.  This map should be available in winter 2015/2016

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

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ER - TY - MAP T1 - Digital conversion of Peck, J.H., 1975, Preliminary bedrock geologic map of the Clinton quadrangle, Worcester County, Mass., U.S. Geological Survey Open File Report 75-658 Y1 - 2012 A1 - Peck, J.A. ED - Joseph P Kopera KW - #BedrockMap KW - #MGSPub KW - andalusite KW - ayer granite KW - Berlin KW - Bolton KW - Boylston KW - Clinton KW - Clinton-Newbury Fault KW - Devens KW - Harvard KW - Lancaster KW - Leominster KW - nashoba KW - Oakdale Quartzite KW - Peck KW - phyllite KW - quartzite KW - Reuben's Hill Formation KW - Sterling KW - tadmuck brook schist KW - Tower Hill quartzite KW - Wekepeke Fault KW - Worcester Formation AB - This map is an interim product and will be superseded by an updated bedrock map of the quadrangle in 2016. This map is a digital version of USGS OFR 75-658: http://pubs.er.usgs.gov/publication/ofr75658 There are some cartographic errors in creating a digital version: A Jurassic diabase dike along the western edge of the quadrangle is not shown in the digital version. These errors are being corrected. JF - Digital Conversion PB - Massachusetts Geological Survey U2 - 1:24000 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 -

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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 fracture characterization map of the Ayer quadrangle, Massachusetts Y1 - 2006 A1 - Joseph P Kopera A1 - Stephen B Mabee A1 - Powers, D.C. KW - #FractureMaps KW - #MGSPub KW - Ayer KW - ayer granite KW - Boxborough KW - chelmsford granite KW - Devens KW - fault KW - Fort Devens KW - fracture KW - fracture trace KW - Groton KW - Harvard KW - hydrostructural domain KW - joint KW - lineament KW - LITTLETON KW - Shirley KW - water resources AB - 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 JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER -