%0 Conference Proceedings %B Geological Society of America Abstracts with Programs %D 2008 %T The influence of ductile structure and rheological heterogeneity on brittle structures as exhibited by Avalonian granites in southeastern Massachusetts %A Joseph P Kopera %K #StaffPubs %K acadian %K alleghenian %K avalon %K BEDROCK %K dikes %K foliation %K fracture %K fracture system %K fracture trace %K fractures %K granite %K granites %K Hopkinton %K joints %K l-tectonites %K lineaments %K lineation %K Milford %K Upton %X The orientation and geographic distribution of joints, veins, and brittle faults show a conspicuous correlation with the heterogeneous distribution of foliation and lineation intensity in Neo-Proterozoic granites and their deformed counterparts in southeastern Massachusetts. Field mapping and stereonet analysis of brittle and ductile structural data collected during 1:24,000-scale geologic mapping of the Milford quadrangle yielded the following general observations, which suggest that the ductile deformational history of this region appears to have strongly influenced the later development of brittle structures in the same rocks:
Email sbmabee @geo.umass.edu
%B Open-File Report %7 OFR-09-03 %I Massachusetts Geological Survey %G eng %0 Map %D 2005 %T [Draft] Fracture characterization map of the Hudson quadrangle, Massachusetts %A Stephen B Mabee %K #FractureMaps %K #MGSPub %K Berlin %K Bolton %K Boxborough %K fault %K fracture %K fracture characterization %K fracture trace %K Harvard %K Hudson %K joint %K Malborough %K Stow %XThis preliminary version of the Fracture Characterization Map of the Hudson Quadrangle (Kopera, 2006) has been removed pending the future release of an updated version of the underlying bedrock geologic. The above version should be considered outdated. If you would like a copy of the outdated map, please contact Joseph Kopera at jkopera[at]geo[dot]geo[dot]umass[dot]edu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 %I Massachusetts Geological Survey %G eng %21:24000
%0 Map %D 2006 %T Fracture characterization map of the Marlborough quadrangle, Massachusetts %A Stephen B Mabee %A Scott A Salamoff %K #FractureMaps %K #MGSPub %K Ashland %K Berlin %K fault %K fracture %K fracture trace %K groundwater %K Hopkinton %K Hudson %K hydrostructural domains %K joint %K lineament %K Malborough %K Northborough %K Southborough %K water resources %K Westborough %B Geologic Map %7 GM-06-02 v 2.1 %I Massachusetts Geological Survey %G eng %21:24000
%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 %21:24000