@article {246, title = {Well Inventory of the Westford quadrangle, Massachusetts}, year = {2009}, publisher = {Massachusetts Geological Survey}, edition = {WI-09-01}, abstract = {Well Inventories of selected 7.5{\textquoteright} quadrangles consist of ESRI ArcView Project files (*.apr), associated ESRI shapefiles and scanned boring logs compiled from several sources. Each *. apr file displays borehole locations, information about the boring itself, and, where available, a scanned image of the boring log. Be sure to read the "README.TXT" file before using this product. }, keywords = {$\#$MGSPub, $\#$Subsurface, $\#$WellInventory, Acton, borings, Boxborough, Carlisle, Chelmsford, Concord, Groton, groundwater, LITTLETON, subsurface, Tyngsborough, wells, Westford}, author = {Fernandez, M.} } @Map {245, title = {Preliminary bedrock geologic map of the Westford quadrangle, Massachusetts}, year = {2009}, publisher = {Massachusetts Geological Survey}, edition = {OFR-09-01}, abstract = {Bedrock Geologic Map contains brittle fracture data Mapping still in progress. For interim fracture database, please contact Joe Kopera }, keywords = {$\#$BedrockMaps, $\#$MGSPub, Acton, amphibolite, ayer granite, Berwick formation, Boxborough, calc-silicates, Carlisle, Chelmsford, chelmsford granite, Clinton-Newbury Fault, Concord, diorite, gneiss, Groton, LITTLETON, magnetite, marble, migmatite, Nashoba Formation, phyllonite, tadmuck brook schist, Tyngsborough, Westford}, author = {Joseph P Kopera and D.C. Alvord and Richard H Jahns and M.E. Willard and W.S. White} } @Map {251, title = {Progress map of the preliminary bedrock geologic map of the Billerica quadrangle, Massachusetts}, year = {2011}, publisher = {Massachusetts Geological Survey}, edition = {OFR11-03}, abstract = {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{\textquoteright}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.}, keywords = {$\#$BedrockMaps, $\#$FractureMaps, $\#$MGSPub, Bedford, Berwick formation, Billerica, Billerica Schist, Boxford formation, Carlisle, Chelmsford, Clinton-Newbury Fault Zone, Concord, fracture, gneiss, joints, Lowell, magnetite, migmatite, nashoba, schist, Spencer Brook Fault, tadmuck brook schist, Tewksbury}, author = {Matthew A Massey} } @Map {247, title = {Progress report of bedrock geologic mapping of the Lowell quadrangle, Massachusetts}, year = {2010}, publisher = {Massachusetts Geological Survey}, edition = {PM-09-01}, abstract = {

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

}, keywords = {$\#$BedrockMaps, $\#$MGSPub, Berwick formation, Chelmsford, Clinton-Newbury Fault, Dracut, Dracut diorite, Dracut gabbro, Dracut pluton, gabbro, Jahns, Lowell, Methuen, nashoba, Nashoba Formation, Tewksbury, Tyngsborough}, author = {Richard H Jahns and Joseph P Kopera} }