@Map {359,
	title = {Bedrock geologic map of the Ayer 7.5{\textquoteright} quadrangle, Worcester and Middlesex Counties, Massachusetts (2015)},
	publisher = {Massachusetts Geological Survey},
	edition = {15-01},
	abstract = {<p>Editing and review are still underway. \&nbsp;This map should be available in winter 2015/2016</p>},
	keywords = {Ayer, ayer granite, Ayer Granodiorite, Ayer Quadrangle, Berwick, Campbell Hill Fault, chelmsford granite, Clinton Newbury Fault, Devens, Harvard Conglomerate, merrimack, Oakdale formation, pin hill, Shepley{\textquoteright}s Hill, Shirley Fault, tadmuck brook schist, Worcester Formation},
	author = {Joseph P Kopera}
}
@Map {252,
	title = {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},
	year = {2012},
	publisher = {Massachusetts Geological Survey},
	edition = {DC12-01},
	abstract = {This map is an interim product and will be superseded by an updated bedrock map of the quadrangle in 2016.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.},
	keywords = {$\#$BedrockMap, $\#$MGSPub, andalusite, ayer granite, Berlin, Bolton, Boylston, Clinton, Clinton-Newbury Fault, Devens, Harvard, Lancaster, Leominster, nashoba, Oakdale Quartzite, Peck, phyllite, quartzite, Reuben{\textquoteright}s Hill Formation, Sterling, tadmuck brook schist, Tower Hill quartzite, Wekepeke Fault, Worcester Formation},
	author = {Peck, J.A.},
	editor = {Joseph P Kopera}
}
@Map {221,
	title = {Preliminary Bedrock Geologic Map of the area surrounding Shepley{\textquoteright}s Hill, Towns of Ayer and Devens, Massachusetts},
	year = {2008},
	publisher = {Massachusetts Geological Survey},
	edition = {OFR08-05},
	keywords = {$\#$BedrockMaps, $\#$MGSPub, army, arsenic, Ayer, ayer granite, chelmsford granite, Clinton Newbury Fault Zone, Devens, landfill},
	author = {Joseph P Kopera}
}
@Map {238,
	title = {Preliminary bedrock geologic map of the Ayer quadrangle, Massachusetts},
	year = {2006},
	publisher = {Massachusetts Geological Survey},
	edition = {OFR-06-02},
	abstract = {<p>
	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</p>
},
	keywords = {$\#$BedrockMaps, $\#$MGSPub, arsenic, Ayer, ayer granite, Berwick formation, Boxborough, chelmsford granite, Clinton-Newbury Fault, Devens, Fort Devens, Groton, Harvard, Jahns, LITTLETON, Merrimack Terrane, mylonite, nashoba, Nashua Trough, Oakdale formation, Shepley{\textquoteright}s Hill Landfill, Shirley, tadmuck brook schist, Worcester Formation},
	url = {http://www.geo.umass.edu/stategeologist/},
	author = {Joseph P Kopera}
}
@Map {235,
	title = {Preliminary fracture characterization map of the Ayer quadrangle, Massachusetts},
	year = {2006},
	publisher = {Massachusetts Geological Survey},
	edition = {OFR-06-03},
	abstract = {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
},
	keywords = {$\#$FractureMaps, $\#$MGSPub, Ayer, ayer granite, Boxborough, chelmsford granite, Devens, fault, Fort Devens, fracture, fracture trace, Groton, Harvard, hydrostructural domain, joint, lineament, LITTLETON, Shirley, water resources},
	author = {Joseph P Kopera and Stephen B Mabee and Powers, D.C.}
}
