@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} }