TY - BOOK T1 - Landslides: Investigation and Mitigation T2 - Special Report Y1 - 1996 A1 - Transportation Research Safety Board KW - #Hazards KW - #Landslides KW - highway KW - Irene KW - landslides AB - TRB Special Report 247 - Landslides: Investigation and Mitigation contains comprehensive, practical discussions of field investigations, laboratory testing, and stability analysis procedures and technologies; comprehensive references to the literature; and discussions of case studies, state-of-the-art techniques, and research directions. JF - Special Report PB - The National Academies UR - https://www.mytrb.org/Store/Product.aspx?ID=5300 ER - TY - BOOK T1 - The stone quarry industry: Pelham, Massachusetts Y1 - 1998 A1 - Bigelow, Paul J KW - #EducationalResources KW - #MassGeology KW - #MineralResources KW - #Minerals KW - dimension stone KW - granite KW - industry KW - Pelham KW - quarries KW - quarry KW - stone UR - http://umass.worldcat.org/title/stone-quarry-industry-pelham-massachusetts/oclc/39956300&referer=brief_results U1 - A copy of this publication can be viewed at the U-Mass Libraries special collections ER - TY - Generic T1 - Arsenic in central Massachusetts bedrock and groundwater T2 - Abstracts with Programs - Geological Society of America Y1 - 2010 A1 - McTigue, David F. A1 - Stein, Carol L. A1 - Brandon, William C. A1 - Joseph P Kopera A1 - Keskula, Anna J. A1 - Koteas, G. Christopher KW - #StaffPubs KW - alteration KW - arsenic KW - arsenides KW - arsenopyrite KW - Ayer Granodiorite KW - BEDROCK KW - central Massachusetts KW - chelmsford granite KW - Devonian KW - dilation KW - discharge KW - dissolved materials KW - drinking water KW - Eh KW - fractures KW - General geochemistry 02A KW - geochemistry KW - granites KW - ground water KW - igneous rocks KW - joints KW - massachusetts KW - metals KW - metamorphism KW - meteoric water KW - overburden KW - Paleozoic KW - petrography KW - plutonic rocks KW - pollutants KW - reduction KW - solubility KW - solution KW - sulfides KW - theoretical models KW - United States AB - Across the New England "arsenic belt," groundwater arsenic (As) concentrations often exceed the EPA's 0.01-mg/L drinking water standard. In overburden groundwater at a site within this belt in north-central Massachusetts, As has been reported at levels up to 7.6 mg/L. Bedrock at the site consists of Silurian Central Maine Terrane metasediments intruded by the Devonian Ayer granodiorite and Chelmsford granite. Exchange of hydrothermal fluids between these lithologies during intrusion and later deformation, faulting, and metamorphism resulted in crystallization of arsenic-bearing minerals, including arsenopyrite. Quaternary deglaciation and unloading dilated joint systems in the bedrock, allowing increased exposure of the mineralogy to meteoric water. Several arsenopyrite alteration products (e.g., scorodite), of varying solubilities, precipitated on fracture surfaces and along grain boundaries between major phases. In the emerging conceptual model for this site, groundwater is recharged in bedrock uplands and moves downgradient through the fracture network, becoming increasingly reducing as it moves along a flow path. Arsenic dissolved from arsenopyrite and arsenic-bearing alteration phases in bedrock remains in solution until the groundwater discharges to lowland areas hydraulically downgradient. In these adjacent lowlands, glacial sand and gravel overburden lies above the bedrock. When the reducing water reaches more oxidizing conditions, As-sorbing hydrous ferric oxides (HFO) precipitate out on the aquifer solids, resulting in accumulation of As in the deep overburden aquifer. A large landfill at this site, now closed and capped, imposed reducing conditions, and As is mobilized into groundwater by reductive dissolution of the HFO. The presence of elevated As in groundwater is consistent with arsenic-bearing phases generated in granitoids at depth during regional metamorphism, which were subsequently altered, and are being solubilized at present by the circulation of shallow groundwater through varying redox environments. This scenario is supported by geochemical and petrographic studies of the granitoids and the occurrence of the highest groundwater and soil arsenic concentrations in the adjacent deep overburden. JF - Abstracts with Programs - Geological Society of America PB - Geological Society of America (GSA) : Boulder, CO, United States CY - United States VL - 42 SN - 00167592 UR - https://gsa.confex.com/gsa/2010AM/finalprogram/abstract_182430.htm IS - 55 N1 - Accession Number: 2011-044094; Conference Name: Geological Society of America, 2010 annual meeting; Denver, CO, United States; Conference Date: 20101031; Language: English; Coden: GAAPBC; Collation: 2; Collation: 216-217; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 201125; Monograph Title: Geological Society of America, 2010 annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic JO - Abstracts with Programs - Geological Society of America ER - TY - Generic T1 - Characterizing fractured crystalline bedrock aquifers using hydrostructural domains in the Nashoba Terrane, eastern Massachusetts T2 - Abstracts with Programs - Geological Society of America Y1 - 2006 A1 - Alex K Manda A1 - Stephen B Mabee A1 - David F Boutt KW - #StaffPubs KW - anisotropy KW - aquifers KW - BEDROCK KW - characterization KW - connectivity KW - crystalline rocks KW - eastern Massachusetts KW - fractures KW - ground water KW - heterogeneity KW - hydraulic conductivity KW - Hydrogeology 21 KW - massachusetts KW - Nashoba terrane KW - outcrops KW - physical properties KW - site exploration KW - United States KW - water wells AB - Fractured crystalline bedrock aquifers are good sources of potable water in many parts of the world. However, siting of highly productive wells in these rock units remains a challenging and expensive task because fracture development at the regional scale is both heterogeneous and anisotropic. Using low cost field data to define units of rock that have similar lithologic and fracture characteristics can significantly reduce time and energy spent on determining areas with better than average aquifer productivity. These physical characteristics that impart a particular hydraulic character on rocks are used to delineate regions with similar hydrologic characteristics called hydrostructural domains (Mackie, 2002). Hydrostructural domains are delineated from fracture characterization data that were collected from 79 outcrops located in the Nashoba Terrane of eastern Massachusetts. Information collected and used to delineate the domains include the number and distribution of fracture sets, types of fractures present or absent, the degree of fracture development, fracture intensity/density, fracture connectivity and rock type. Discrete fracture networks are generated from the fracture characterization data to simulate groundwater flow in the region. Conductivity of particular units is evaluated and compared to results from existing pumping tests obtained from the US Geological Survey. Preliminary results indicate that there is great value in utilizing fracture characteristic data obtained from surface outcrops to predict subsurface groundwater flow characteristics of fractured bedrock aquifers. Water managers, developers and decision makers are eager to know which areas are the most promising for encountering highly conductive zones in the subsurface. Collecting extensive structural data from surface outcrops, although not as accurate as drilling wells, is a cheaper alternative that could provide at least a rough estimate of the hydraulic properties of fractured rocks leading to effective siting of new water wells. Hydrostructural domain maps may pinpoint specific areas that have a high potential for wells to encounter highly conductive zones and could therefore be a powerful tool in transferring information from one site to another without having to repeatedly undertake extensive site characterization. JF - Abstracts with Programs - Geological Society of America PB - Geological Society of America (GSA) : Boulder, CO, United States CY - United States VL - 38 SN - 00167592 UR - https://gsa.confex.com/gsa/2006AM/finalprogram/abstract_113075.htm IS - 77 N1 - Accession Number: 2007-032741; Conference Name: Geological Society of America, 2006 annual meeting; Philadelphia, PA, United States; Conference Date: 20061022; Language: English; Coden: GAAPBC; Collation: 1; Collation: 25; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 200709; Monograph Title: Geological Society of America, 2006 annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic JO - Abstracts with Programs - Geological Society of America ER - TY - Generic T1 - Evidence for arsenic-mineralization in granitic basement rocks, Ayer Granodiorite, northeastern Massachusetts T2 - Abstracts with Programs - Geological Society of America Y1 - 2010 A1 - Koteas, G. Christopher A1 - Keskula, Anna J. A1 - Stein, Carol L. A1 - McTigue, David F. A1 - Joseph P Kopera A1 - Brandon, William C. KW - #StaffPubs KW - acadian KW - arsenic KW - arsenides KW - arsenopyrite KW - Ayer Granodiorite KW - Berwick formation KW - fractured materials KW - geochemistry KW - granodiorites KW - Igneous and metamorphic petrology 05A KW - igneous rocks KW - lower Paleozoic KW - massachusetts KW - Merrimack Synclinorium KW - metals KW - metamorphic rocks KW - metamorphism KW - metasedimentary rocks KW - metasomatism KW - Middlesex County Massachusetts KW - migration of elements KW - mineralization KW - Mineralogy of non-silicates 01C KW - northeastern Massachusetts KW - orogeny KW - Paleozoic KW - plutonic rocks KW - pollutants KW - pollution KW - pyrite KW - sulfides KW - United States AB - Core samples of the Ayer Granodiorite along the eastern margin of the Merrimack Belt in northeastern Massachusetts host a series of sulfide and oxide phases that resulted from interaction with sulfide-bearing meta-sedimentary host rocks. Euhedral arsenopyrite grains are found with ilmenite, apatite, and REE phosphates in zones that generally mimic the intersection between a gneissic fabric and a relict magmatic foliation. Arsenopyrite crystals are typically elongate with this lineation. Euhedral to subhedral pyrite crystals have also been observed, but are localized to areas without As-bearing phases. Micro-fractures that parallel either a steep NW-striking joint set or gently-dipping sheeting joints are commonly filled with interwoven calcite cements and As-bearing Fe-oxides. Surface coatings of major fracture sets are also characterized by Fe-As-rich rinds that host micron-scale sub-angular particles of quartz, feldspars, and phyllosilicates. Where micro-fractures are most concentrated, sulfide-bearing minerals are less common; however, subhedral to anhedral arsenopyrite grains do occur along some open micro-fractures. These crystals preserve lobate grain boundaries and are associated with As-bearing Fe-oxide-rich coatings along adjacent fractures. The presence of 1) pyrite, 2) arsenopyrite associated with phosphates, and 3) As-bearing fracture coatings suggests multiple stages of mineralization. We propose that intrusion-related fluid-rock interaction associated with heating of nearby sulfide-bearing schists of the Berwick Formation during Acadian orogenesis may have provided the necessary constituents for growth of sulfide phases in the Ayer. It appears that Late Devonian greenschist facies metamorphism and metasomatism led to mineralization that generated arsenopyrite and accompanying phosphates; however, the role of the cross-cutting Clinton Newbury Fault Zone as a conduit for hydrothermal fluids may also be important. Lower temperature As-bearing Fe-oxide and calcite coatings on open fractures surfaces may be associated with a change from lithostatic- to hydrostatic-pressures during post-glacial regional uplift. This mineralization appears to be synchronous with intense microfracturing that post-dates all other mineralization. JF - Abstracts with Programs - Geological Society of America PB - Geological Society of America (GSA) : Boulder, CO, United States CY - United States VL - 42 SN - 00167592 UR - https://gsa.confex.com/gsa/2010NE/finalprogram/abstract_169998.htm IS - 11 N1 - Accession Number: 2010-100047; Conference Name: Geological Society of America, Northeastern Section, 45th annual meeting; Geological Society of America, Southeastern Section, 59th annual meeting; Baltimore, MD, United States; Conference Date: 20100314; Language: English; Coordinates: N420800N424400W0710200W0715300; Coden: GAAPBC; Collation: 1; Collation: 160; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 201052; Monograph Title: Geological Society of America, Northeastern Section, 45th annual meeting; Geological Society of America, Southeastern Section, 59th annual meeting; joint meeting, abstracts volume; Monograph Author(s): Anonymous; Reviewed Item: Analytic JO - Abstracts with Programs - Geological Society of America ER - TY - Generic T1 - Implications of diurnal river fluctuations on mass transport in a valley-fill aquifer T2 - Abstracts with Programs - Geological Society of America Y1 - 2006 A1 - Brandon J Fleming A1 - David F Boutt A1 - Stephen B Mabee KW - #StaffPubs KW - aquifers KW - BEDROCK KW - clastic sediments KW - controls KW - diffusion KW - diurnal variations KW - drainage KW - drift KW - Eastern U.S. KW - Environmental geology 22 KW - floods KW - fluctuations KW - geochemical cycle KW - geologic hazards KW - ground water KW - measurement KW - mixing KW - models KW - Northeastern U.S. KW - numerical models KW - nutrients KW - pollution KW - processes KW - pumping KW - quantitative analysis KW - residence time KW - sediments KW - shallow aquifers KW - surface water KW - three-dimensional models KW - tracers KW - transport KW - United States KW - valleys KW - water pollution KW - water resources KW - water wells AB - Aquifers located in isolated stratified drift deposits in the northeastern portion of the US are extremely fragile and important groundwater resources. These aquifers, when restricted to bedrock valleys, are often strongly coupled to significant surface water drainage systems. In northwestern Massachusetts, surface water associated with the Deerfield River watershed is highly regulated by dams to protect against flooding and to generate hydroelectric power. Regular releases of water from these dams cause diurnal fluctuations in river stage. In a previous study performed by the USGS, measurements from two clusters of wells show a significant response to river stage fluctuations in the aquifer. Fluctuations in river stage and resulting changes in head levels in the aquifer cause a switch from a losing to a gaining stream. The flow reversals have implications for mass transport and nutrient cycling within the hyporheic zone. In this paper we investigate the physical hydrologic controls on mass transport in the shallow aquifer. Using a coupled groundwater flow and transport code, we built a quasi three dimensional transient numerical model to approximate the head changes in the aquifer caused by the stage fluctuations in the river. Flow velocities and residence times were estimated in the aquifer for a variety of flow conditions. The mixing process driven by the aquifer head changes were quantified in the proximity of the hyporheic zone and shown to significantly influence both vertical and horizontal flow velocities in a region close to the stream-aquifer boundary. The diurnal river stage changes also appear to influence farfield hydrologic conditions and potentially hydrologically isolate the river and hyporheic zone. To further investigate these mixing processes we applied a mass transport code with conservative tracers to the aquifer. Fluctuation of the river stage combined with the heterogeneous nature of the aquifer creates a pumping mechanism that creates excess mixing within shallow portions of the aquifer. Aquifer dispersivity and molecular diffusion both contribute to the anomalous mixing modeled in the shallow aquifer. Mixing driven by stream stage changes has important implications for nutrient cycling as well as contaminant transport in the shallow aquifer. JF - Abstracts with Programs - Geological Society of America PB - Geological Society of America (GSA) : Boulder, CO, United States CY - United States VL - 38 SN - 00167592 UR - https://gsa.confex.com/gsa/2006AM/finalprogram/abstract_115285.htm IS - 77 N1 - Accession Number: 2010-061334; Conference Name: Geological Society of America, 2006 annual meeting; Philadelphia, PA, United States; Conference Date: 20061022; Language: English; Coden: GAAPBC; Collation: 1; Collation: 468; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 201034; Monograph Title: Geological Society of America, 2006 annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic JO - Abstracts with Programs - Geological Society of America ER - TY - Generic T1 - Improving seismic hazard assessment in New England through the use of surficial geologic maps and expert analysis T2 - Geological Society of America Abstracts with Programs Y1 - 2013 A1 - Becker, Laurence R. A1 - Patriarco, Steven P. A1 - Marvinney, Robert G. A1 - Thomas, Margaret A. A1 - Stephen B Mabee A1 - Fratto, Edward S. KW - #StaffPubs KW - earthquakes KW - Environmental geology KW - geologic hazards KW - maps KW - natural hazards KW - New England KW - risk assessment KW - seismic risk KW - seismic zoning KW - surficial geology KW - surficial geology maps KW - technology KW - United States AB - In New England, earthquakes pose a risk to the built environment. New England state geological surveys partnered with the Northeast States Emergency Consortium to integrate geologic information and GIS analysis for risk communication. Connecticut, Maine, Massachusetts, and Vermont employed surficial geologic maps, deglaciation history, glacial stratigraphy, and professional judgment to reclassify surficial geologic materials into one of the five National Earthquake Hazard Reduction Program (NEHRP) site classifications (A, B, C, D, and E). These new classifications were used in the HAZards U.S. Multi-Hazard (HAZUS-MH) risk assessment application as a substitute for site class value of "D," used in HAZUS-MH throughout New England as a default value. Coding of surficial geologic materials for the five NEHRP site classifications was then compared with classifications using the Wald methodology, a method using slope analysis as a proxy for shear-wave velocity estimates. Comparisons show that coding to site classes using the Wald methodology underestimates categories A (high-velocity shear-wave materials, least relative hazard) and E (lowest-velocity shear-wave materials, greatest relative hazard) when evaluated side by side with coding done with the aid of surficial geologic maps. Geologic maps provide insights into the location of buried low shear wave velocity materials not afforded by the Wald methodology. North of the glacial limit, derangement of drainage resulted in extensive ponding of meltwaters and the subsequent deposition of thick sequences of lacustrine mud. Inundation by the sea immediately following deglaciation in New England resulted in the deposition of spatially extensive and locally thick sequences of glacial marine mud. Surficial geologic maps better capture these circumstances when compared with the Wald methodology. Without the use of surficial geologic maps, significant areas of New England will be incorrectly classified as being more stable than actual site conditions would allow. By employing surficial geologic information, HAZUS-MH earthquake loss estimates are improved, providing local and regional emergency managers with more accurate information for locating and prioritizing.

JF - Geological Society of America Abstracts with Programs PB - Geological Society of America (GSA) : Boulder, CO, United States CY - United States VL - 45 SN - 00167592 UR - https://gsa.confex.com/gsa/2013NE/webprogram/Paper214837.html IS - 11 N1 - Accession Number: 2014-021037; Conference Name: Geological Society of America, Northeastern Section, 48th annual meeting; Bretton Woods, NH, United States; Conference Date: 20130318; Language: English; Coden: GAAPBC; Collation: 2; Collation: 50-51; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 201414; Monograph Title: Geological Society of America, Northeastern Section, 48th annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic JO - Abstracts with Programs - Geological Society of America ER - TY - Generic T1 - Subtle modification of glacially derived materials along Massachusetts’ southern coast by passing summer storms T2 - Abstracts with Programs - Geological Society of America Y1 - 2015 A1 - Nicholas L Venti A1 - Sabina Gessay A1 - Paul Southard A1 - Douglass Beach A1 - Margot Mansfield A1 - Stephen B Mabee A1 - Jonathan D Woodruff KW - #StaffPubs KW - Barges Beach KW - beach KW - beach erosion KW - beach profile KW - BOEM KW - Buzzard's Bay KW - climate change KW - coast KW - coastal KW - cobble KW - Cuttyhunk Island KW - dune KW - East beach KW - Edgartown KW - erosion KW - Falmouth KW - grain-size KW - Horseneck beach KW - intertidal KW - Low beach KW - Martha's Vineyard KW - Miacomet beach KW - Nantucket KW - nourishment KW - Oak Bluffs KW - offshore KW - onshore KW - Plum Island KW - profiles KW - sand KW - sea level rise KW - storm KW - Surf Beach KW - Sylvia State beaches KW - Town beach KW - Westport KW - winter storm AB - Engineered resupply of sand to coastal environments, i.e. nourishment, offers an attractive short-term strategy to address beach erosion in Massachusetts. For efficient nourishment, site-specific knowledge of seasonal grain size and sediment volume variability at eroding beaches is essential. We have begun measuring grain size and profile at 22 eroding Massachusetts beaches, capturing summer and winter conditions at each site through four to nine representative transects perpendicular to the shore and spaced 100-500 meters apart. Our recently completed first summer field season (August/September 2014) visited eight beaches along Massachusetts’ south coast from Rhode Island to Nantucket. These environments should reflect regional glacial history and a summer interval of reduced storm activity. Where unstratified surficial materials characterize the coast, erosion of glacial till (Horseneck and East beaches, Westport) and end moraine (Barges Beach, Cuttyhunk Island; Town and Sylvia State beaches, Oak Bluffs/Edgartown) can yield cobble berms capping steep intertidal zones. We noted that increased wave activity during storms strips a thin (inches-thick) layer of intertidal sand to reveal gravel and cobble below, while leaving beach profile essentially unchanged. In contrast, where (cobble-free) glacial outwash intersects the coast (Surf Beach, Falmouth; Miacomet and Low beaches, Nantucket) sand and gravel are distributed more evenly across beach facies. Here passing summer storms modify beach profile but not grain size: high surf cuts sandy berms, shifting steepened intertidal zones landward. We will reoccupy south coast sites at the end of winter in 2015 to examine effects of seasonally related increase in storm (and wave) activity. Survey of Massachusetts’ east coast (Sandwich to New Hampshire) is planned for summer of 2015 and winter of 2016. Additionally, overwash sequences recovered through backbarrier basin coring at selected sites complement our beach survey by providing depositional records of particularly strong storms. Study results will allow identification of suitably matched nourishment sources onshore, or offshore, as described in Massachusetts’ Office of Coastal Zone Management’s extensive grain-size database. JF - Abstracts with Programs - Geological Society of America PB - Geological Society of America (GSA) : Boulder, CO, United States CY - Northeastern Section - 50th Annual Meeting (23–25 March 2015), Bretton Woods, NH VL - 47 UR - https://gsa.confex.com/gsa/2015NE/webprogram/Paper252510.html ER - TY - JOUR T1 - A field study (Massachusetts, USA) of the factors controlling the depth of groundwater flow systems in crystalline fractured-rock terrain JF - Hydrogeology Journal Y1 - 2010 A1 - David F Boutt A1 - Diggins, Patrick A1 - Stephen B Mabee KW - #StaffPubs KW - aquifers KW - boreholes KW - crystalline rocks KW - eastern Massachusetts KW - fractured materials KW - fractures KW - ground water KW - hydraulic conductivity KW - Hydrogeology 21 KW - massachusetts KW - Nashoba terrane KW - permeability KW - porosity KW - preferential flow KW - shallow-water environment KW - substrates KW - United States AB - Groundwater movement and availability in crystalline and metamorphosed rocks is dominated by the secondary porosity generated through fracturing. The distributions of fractures and fracture zones determine permeable pathways and the productivity of these rocks. Controls on how these distributions vary with depth in the shallow subsurface (<300 m) and their resulting influence on groundwater flow is not well understood. The results of a subsurface study in the Nashoba and Avalon terranes of eastern Massachusetts (USA), which is a region experiencing expanded use of the fractured bedrock as a potable-supply aquifer, are presented. The study logged the distribution of fractures in 17 boreholes, identified flowing fractures, and hydraulically characterized the rock mass intersecting the boreholes. Of all fractures encountered, 2.5% are hydraulically active. Boreholes show decreasing fracture frequency up to 300 m depth, with hydraulically active fractures showing a similar trend; this restricts topographically driven flow. Borehole temperature profiles corroborate this, with minimal hydrologically altered flow observed in the profiles below 100 m. Results from this study suggest that active flow systems in these geologic settings are shallow and that fracture permeability outside of the influence of large-scale structures will follow a decreasing trend with depth. Copyright 2010 Springer-Verlag PB - Springer : Berlin - Heidelberg, Germany CY - Federal Republic of Germany VL - 18 SN - 1431217414350157 UR - http://link.springer.com/article/10.1007%2Fs10040-010-0640-y IS - 88 N1 - Accession Number: 2011-042136; Language: English; Coordinates: N420000N425000W0695500W0714500; Collation: 16; Publication Types: Serial; Updated Code: 201124; Illustration(s): illus. incl. 3 tables, geol. sketch map; Number of References: 58; Reviewed Item: Analytic JO - Hydrogeology Journal ER - TY - JOUR T1 - Implications of anthropogenic river stage fluctuations on mass transport in a valley fill aquifer JF - Water Resources Research Y1 - 2009 A1 - David F Boutt A1 - Brandon J Fleming KW - #Hydro KW - #WaterResources KW - aquifers KW - boundary conditions KW - Charlemont KW - Deerfield River basin KW - fluctuations KW - fluvial features KW - Franklin County Massachusetts KW - ground water KW - human activity KW - Hydrogeology 21 KW - hydrology KW - massachusetts KW - numerical models KW - preferential flow KW - rivers KW - shallow aquifers KW - streams KW - surface water KW - transport KW - two-dimensional models KW - United States KW - valleys AB - In humid regions a strong coupling between surface water features and groundwater systems may exist. In these environments the exchange of water and solute depends primarily on the hydraulic gradient between the reservoirs. We hypothesize that daily changes in river stage associated with anthropogenic water releases (such as those from a hydroelectric dam) cause anomalous mixing in the near-stream environment by creating large hydraulic head gradients between the stream and adjacent aquifer. We present field observations of hydraulic gradient reversals in a shallow aquifer. Important physical processes observed in the field are explicitly reproduced in a physically based two-dimensional numerical model of groundwater flow coupled to a simplistic surface water boundary condition. Mass transport simulations of a conservative solute introduced into the surface water are performed and examined relative to a stream condition without stage fluctuations. Simulations of 20 d for both fluctuating river stage and fixed high river stage show that more mass is introduced into the aquifer from the stream in the oscillating case even though the net water flux is zero. Enhanced transport by mechanical dispersion leads to mass being driven away from the hydraulic zone of influence of the river. The modification of local hydraulic gradients is likely to be important for understanding dissolved mass transport in near-stream aquifer environments and can influence exchange zone processes under conditions of high-frequency stream stage changes. PB - American Geophysical Union : Washington, DC, United States VL - 45 SN - 0043139719447973 UR - http://onlinelibrary.wiley.com/doi/10.1029/2007WR006526/full IS - 44 JO - Water Resources Research ER - TY - JOUR T1 - Improving seismic hazard assessment in New England through the use of surficial geologic maps and expert analysis JF - Special Paper - Geological Society of America Y1 - 2012 A1 - Becker, Laurence R. A1 - Patriarco, Steven P. A1 - Marvinney, Robert G. A1 - Thomas, Margaret A. A1 - Stephen B Mabee A1 - Fratto, Edward S. KW - #StaffPubs KW - civil engineering KW - earthquakes KW - Eastern U.S. KW - Engineering geology 30 KW - Environmental geology 22 KW - geologic hazards KW - mitigation KW - natural hazards KW - New England KW - Northeastern U.S. KW - risk assessment KW - risk management KW - safety KW - seismic risk KW - seismicity KW - United States AB - (GSA Special Paper) In New England, earthquakes pose a risk to the built environment. Emergency preparedness and mitigation planning are prudent in this region as older unreinforced masonry buildings and numerous critical facilities are common. New England state geological surveys cooperate with the Northeast States Emergency Consortium (NESEC) to improve risk communication with emergency managers. To that end, Connecticut, Maine, Massachusetts, and Vermont employed surficial geologic maps, deglaciation history, knowledge of the glacial stratigraphy, and professional judgment to reclassify surficial geologic material units into one of the five National Earthquake Hazards Reduction Program (NEHRP) site classifications (A, B, C, D, and E). These new classifications were used as a substitute for the HAZards U.S. Multi-Hazard (HAZUS-MH) site class value of "D," which is used throughout New England as a default value. In addition, coding of surficial geologic materials for the five NEHRP site classifications was compared with classifications using the Wald methodology, a method that uses a slope analysis as a proxy for shear-wave velocity estimates. Comparisons show that coding to site classes using the Wald methodology underestimates categories A (high-velocity shear-wave materials, least relative hazard) and E (lowest-velocity shear-wave materials, greatest relative hazard) when evaluated side by side with coding done with the aid of surficial geologic maps. North of the glacial limit, derangement of drainage resulted in extensive ponding of meltwaters and the subsequent deposition of thick sequences of lacustrine mud. Inundation by the sea immediately following deglaciation in New England resulted in the deposition of spatially extensive and locally thick sequences of glacial marine mud. Surficial geologic maps better capture this circumstance when compared with the Wald topographic slope analysis. Without the use of surficial geologic maps, significant areas of New England will be incorrectly classified as being more stable than the site conditions that actually exist. By employing surficial geologic information, we project an improved accuracy for HAZUS-MH earthquake loss estimations, providing local and regional emergency managers with more accurate information for locating and prioritizing earthquake planning, preparedness, and mitigation projects to reduce future losses. PB - Geological Society of America (GSA) : Boulder, CO, United States CY - United States VL - 493 SN - 007210779780813724935 UR - http://specialpapers.gsapubs.org/content/493/221.abstract N1 - Accession Number: 2013-034008; Conference Name: Geological Society of America, 2010 annual meeting; Denver, CO, United States; Conference Date: 20101031; Language: English; Coden: GSAPAZ; Collation: 22; Collation: 221-242; Publication Types: Serial; Conference document; Updated Code: 201321; Illustration(s): illus. incl. 6 tables, geol. sketch maps; Number of References: 36; Monograph Title: Recent advances in North American paleoseismology and neotectonics east of the Rockies; Monograph Author(s): Cox, Randel Tom [editor]; Tuttle, Martitia P. [editor]; Boyd, Oliver S. [editor]; Locat, Jacques [editor]; Reviewed Item: Analytic JO - Special Paper - Geological Society of America ER - TY - JOUR T1 - A method of estimating bulk potential permeability in fractured-rock aquifers using field-derived fracture data and type curves JF - Hydrogeology Journal Y1 - 2013 A1 - Alex K Manda A1 - Stephen B Mabee A1 - David F Boutt A1 - Cooke, Michele L. KW - #StaffPubs KW - aquifers KW - boundary conditions KW - eastern Massachusetts KW - fractured materials KW - fractures KW - ground water KW - Hydrogeology 21 KW - massachusetts KW - Nashoba terrane KW - naturally fractured reservoirs KW - numerical models KW - permeability KW - prediction KW - pump tests KW - simulation KW - two-dimensional models KW - United States AB - A method is devised for estimating the potential permeability of fracture networks from attributes of fractures observed in outcrop. The technique, which is intended as a complement to traditional approaches, is based on type curves that represent various combinations of fracture lengths, fracture orientations and proportions (i.e., intensities) of fractures that participate in flow. Numerical models are used to derive the type curves. To account for variations in fracture aperture, a permeability ratio (R) defined as the permeability of a fracture network in a domain divided by the permeability of a single fracture with identical fracture apertures, is used as a dependent variable to derive the type curves. The technique works by determining the point on the type curve that represents the fracture characteristics collected in the field. To test the performance of the technique, permeabilities that were derived from fractured-rock aquifers of eastern Massachusetts (USA) are compared to permeabilities predicted by the technique. Results indicate that permeabilities estimated from type curves are within an order of magnitude of permeabilities derived from field tests. First-order estimates of fracture-network permeability can, therefore, be easily and quickly acquired with this technique before more robust and expensive methods are utilized in the field. Copyright 2012 Springer-Verlag Berlin Heidelberg PB - Springer : Berlin - Heidelberg, Germany CY - Federal Republic of Germany VL - 21 SN - 1431217414350157 UR - http://link.springer.com/article/10.1007%2Fs10040-012-0919-2 IS - 22 N1 - Accession Number: 2013-055373; Language: English; Coordinates: N421500N424500W0704500W0714500; Collation: 13; Publication Types: Serial; Updated Code: 201334; Illustration(s): illus. incl. 4 tables, geol. sketch maps; Number of References: 41; Reviewed Item: Analytic JO - Hydrogeology Journal ER - TY - MAP T1 - [Draft] Preliminary bedrock geologic map of the Oxford quadrangle, Worcester County, Massachusetts, Providence County, Rhode Island and Windam County, Connecticut Y1 - 2005 A1 - Patrick J Barosh KW - #BedrockMaps KW - #MGSPub KW - Bloody Bluff KW - Douglas KW - faults KW - gneiss KW - granite KW - Lake Char KW - Marlborough Formation KW - Nashoba Formation KW - Nashua Trough KW - Northbridge granite gneiss KW - Oxford KW - Sutton KW - Webster JF - Open File Report PB - Massachusetts Geological Survey U1 -

GIS and metadata are forthcoming

U2 -

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ER - TY - MAP T1 - Onshore-Offshore Surficial Geologic Map of the Newburyport East and Northern Half of the Ipswich Quadrangles, Massachusetts Y1 - 2010 A1 - Hein, C.J. A1 - Fitzgerald, D.M, A1 - Barnhardt, W.A. A1 - Byron D Stone KW - #MGSPub KW - #OnshoreOffshore KW - #SurficialMaps KW - coastal KW - Essex KW - glacial KW - Gloucester KW - Hamilton KW - Ipswich KW - Newburport KW - Newbury KW - Newburyport KW - onshore KW - Plum Island KW - Rowley KW - Salisbury KW - surficial AB - This geologic map shows the distribution of surficial subaerial and subaqueous materials in the Newburyport East and northern half of the Ipswich 7.5' quadrangles (northeast Massachusetts) and the area of the Gulf of Maine immediately offshore, to an approximate depth of 80 m below modern mean sea level (MSL). This map was compiled from the onshore surficial geologic map of Stone et al. (2006) and the offshore surficial mapping of Barnhardt et al. (2009), and includes newly mapped shallow offshore geologic features. Onshore and offshore units are continuous across the shallow- water zone (0-20 m below MSL). The definition of map units is based on lithologic characteristics (grain size, mineralogy and structure), stratigraphic relationships and relative ages, and sedimentologic processes. The map describes the evolution of the surficial geology in terms of the sediment sources, transportation mechanisms, and depositional, post-depositional and modern processes that have acted on the late Quaternary sediments that compose these units. Cross sections are derived from subsurface data compiled from the literature and collected as part of this study. This maps supersedes MGS OFR 2011-01 JF - Geologic Map PB - Massachusetts Geological Survey U1 - Note: this version has been peer reviewed, edited, and supersedes all previously published, open-file, versions of this map (2010) U2 - 1:24000 ER - TY - MAP T1 - Onshore-offshore surficial geologic map of the Provincetown Quadrangle, Barnstable County, Massachusetts Y1 - 2012 A1 - Borrelli, M. A1 - Gontz, A.M. A1 - Wilson, J.R. A1 - Brown, T.L.B. A1 - Norton, A.R. A1 - and G S Geise KW - #MGSPub KW - #OnshoreOffshore KW - #SurficialMaps KW - Cape Cod KW - coastal KW - glacial KW - offshore KW - onshore KW - Provincetown KW - surficial KW - Truro AB - Undergoing Editing and Review. Please contact sbmabee[at]geo[dot]umass[dot]edu for latest version. PB - Massachusetts Geological Survey ER - TY - MAP T1 - Preliminary bedrock geologic Map of the Webster quadrangle, Massachusetts Y1 - 2009 A1 - Patrick J Barosh KW - #BedrockMaps KW - #MGSPub KW - ayer granite KW - Charlton KW - Dudley KW - Eastford granite KW - Nashua Trough KW - Oakdale Quartzite KW - Oxford KW - Paxton Formation KW - Paxton Group KW - Plainville KW - Plainville Formation KW - Southbridge KW - Webster KW - Worcester Formation JF - Open-File Report PB - Massachusetts Geological Survey U2 -

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ER - TY - MAP T1 - Progress map of the onshore-offshore surficial geologic map of the North Truro quadrangle, Barnstable County, Massachusetts Y1 - 0 A1 - Borrelli, M. A1 - Gontz, A.M. A1 - Smith, T.L. A1 - Wilson, J.R. A1 - Shumchenia, E.J. A1 - and G S Geise KW - #MGSPub KW - #OnshoreOffshore KW - #SurficialMaps KW - Cape Cod KW - dunes KW - glacial KW - offshore KW - onshore KW - onshore-offshore KW - Pleistocene KW - surficial KW - Truro AB - Map undergoing editing and review. Please contact sbmabee@geo.umass.edu for a copy. PB - Massachusetts Geological Survey U2 - 1:24000 ER - TY - RPRT T1 - Carbon Sequestration: Developing an assessment of potential CO2 storage resources in Massachusetts - Final Report: Estimate of CO2 Storage Resource Potential in Massachusetts Saline Aquifers and Unmineable Coal Seams Y1 - 2011 A1 - Stephen B Mabee A1 - David F Boutt A1 - Petsch, Steven T KW - #MGSPub KW - #MGSPubs KW - #Report KW - #Reports KW - Carbon KW - climate change KW - CO2 KW - coal KW - coal seams KW - Hartford Basin KW - injection KW - Narragansett Basin KW - sequestration AB - Geologic carbon sequestration, defined as the permanent storage of CO2 in underground geologic reservoirs, is emerging as an important strategy towards mitigation of increasing accumulation of CO2 in the atmosphere and associated greenhouse gas warming and climate change. These efforts have been organized nationally through programs such as the U.S. Department of Energy – Office of Fossil Energy – National Energy Technology Laboratory (NETL) – Carbon Sequestration Program and the United States Geological Survey (USGS) – Energy Resources Program – Health and Environment Section – Geologic CO2 Sequestration Research initiative. These organizations have partnered with a network of regional participants to evaluate CO2 storage resource potentials in geologic formations throughout the United States and Canada, through the Regional Carbon Sequestration Partnerships program. To date, however, CO2 storage resource potentials for geologic formations in Massachusetts have not been incorporated into any national or regional carbon sequestration initiative, nor have resources for local geologic carbon storage in Massachusetts been estimated or calculated. During a preliminary investigation into geologic carbon sequestration potential in Massachusetts, researchers at the University of Massachusetts identified five potential candidate geologic formations for further study. These include: sandstone aquifers in the Connecticut River Valley, unmineable coal seams in southeastern Massachusetts, organic-rich shales in the Connecticut River Valley, basalts in the Connecticut River Valley, and organic-rich metamorphic rocks in the western Berkshire Hills. Through sponsorship from the Massachusetts Clean Energy Center, a project was developed to gain more information about these candidate formations related to their hydrogeologic characteristics and potential carbon storage resource. This information has been used to assess if some or all of these candidates meet screening criteria for geologic carbon storage and to provide data for volumetric carbon storage models as outlined by methodologies developed by the USGS and NETL. This research also has identified gaps in knowledge and information regarding key hydrogeologic characteristics for the candidate formations in Massachusetts. These data are required to determine if formations meet screening criteria and to estimate total storage resources. Prepared for the Massachusetts Clean Energy Center under Task Order 09-1 PB - Massachusetts Geological Survey CY - Amherst, MA UR - http://www.geo.umass.edu/stategeologist/Products/reports/CarbonSequestrationReport.pdf ER - TY - RPRT T1 - Hydrogeologic investigation of the west Charlemont aquifer, Charlemont, Massachusetts Y1 - 2007 A1 - Stephen B Mabee A1 - Flemig, B. A1 - David F Boutt KW - #Hydro KW - #MGSPub KW - #Reports KW - #WaterResources KW - aquifer KW - Charlemont KW - controlled release KW - dam KW - Deerfield River KW - hydro KW - hydrogeology KW - power AB -

The University of Massachusetts Department of Geosciences and Office of the Massachusetts State Geologist were asked by the Franklin Regional Council of Governments to make an assessment of the extent, thickness and hydraulic properties of the West Charlemont aquifer located in valley fill deposits along the Deerfield River in the Town of Charlemont, Massachusetts. Previous work by Gay et al. (1974) mapped these fill deposits as a medium yield aquifer (51 gallons per minute, gpm, to 200 gpm). The purpose of this investigation is to evaluate further the potential of this medium yield aquifer as a viable groundwater resource for the Town of Charlemont. Results from six new seismic refraction surveys, three new boreholes, analysis of grain size distribution curves and a review of previous borehole logs and geophysical surveys were compiled to build a conceptual 3-dimensional visualization of the aquifer system. These data were used to make a first-order estimate of potential yield.

PB - Massachusetts Geological Survey UR - http://www.geo.umass.edu/stategeologist/Products/reports/CharlemontFinalReport.pdf ER - TY - RPRT T1 - Preliminary compilation of the bedrock geology of the land area of the Boston 2 degree sheet, Massachusetts, Connecticut, Rhode Island and New Hampshire Y1 - 1977 A1 - Patrick J Barosh A1 - Fahey, Richard J. A1 - Pease, Maurice Henry, Jr. KW - #MassGeology KW - #MassGeologyMap KW - bedrock geology KW - Connecticut KW - eastern MA KW - GEOLOGY KW - map KW - massachusetts KW - New Hampshire KW - Rhode Island JF - USGS Open File Report UR - http://pubs.er.usgs.gov/publication/ofr77285 U1 -

An alternative interpretation of the geology of the eastern part of the state.

ER - TY - RPRT T1 - Report to the government of the British Virgin Islands on the status of beach erosion and water pollution Y1 - 1994 A1 - Belt, E.S. A1 - Davis, R.A. A1 - Stephen B Mabee KW - #StaffPubs KW - beach erosion KW - British Virgin Islands KW - erosion KW - pollution KW - Virgin Islands KW - water pollution ER -