%0 Conference Proceedings %B Abstracts with Programs - Geological Society of America %D 2010 %T Foraminifera ecology on the continental shelf, Merrimack Embayment, Gulf of Maine, New England %A Steven A Nathan %A Leckie, R. Mark %A Stephen B Mabee %K #StaffPubs %K applications %K Atlantic Ocean %K benthic taxa %K Cenozoic %K cluster analysis %K deltaic environment %K Economic geology, geology of nonmetal deposits 28A %K Foraminifera %K gravel deposits %K Gulf of Maine %K Invertebrata %K Maine %K marine environment %K marine sediments %K massachusetts %K Merrimack River valley %K microfossils %K mining %K North Atlantic %K paleoecology %K paleogeography %K Pleistocene %K Protista %K Quaternary %K Quaternary geology 24 %K sand deposits %K sea-level changes %K sediments %K shelf environment %K species diversity %K statistical analysis %K United States %K upper Pleistocene %X During the late Pleistocene the Merrimack River paleodelta formed as post-glacial rebound produced a local low stand in sea level. Drowned as sea level rose, the paleodelta is now being reworked by a variety of processes. This study uses benthic foraminifera as a biotic and environmental proxy to study the sand and gravel resources of the paleodelta. Nineteen sediment samples were collected from the paleodelta along two east-west transects east of the Merrimack River. From these samples nearly 6000 benthic foraminifera, representing 62 species, were collected and identified. Although dissolution compromised the preservation of calcite tests within six samples, the resulting data is robust and allows for numerous conclusions to be drawn. Specifically, benthic foraminifera become more common distally and specific species inhabit specific areas of the paleodelta. Distribution patterns of some species have changed significantly since the late 1940s, with some species migrating landward, others, seaward. Distributions of some taxa differ significantly between the two transects, both in the present day and from the past. These differences may point to the influence of, and changes in, the Merrimack River outflow upon water column nutrient delivery, productivity and food availability over the past 60 years. Species diversity and evenness peak at the delta break, coincident with low species dominance at 50 meters water depth. Q-mode cluster analyses show three distinct assemblages, "shallow" (< or =30 meters water depth), "deep" (> or =40 meters), and "delta edge" (50 meters). There is no apparent correlation between foraminiferal distributions and deltaic bedforms, and in turn, sediment type. This implies that foraminiferal distributions are controlled by other environmental variables such as food. In summary, benthic foraminiferal assemblage analyses complement geophysical techniques. Benthic foraminifera can also help assess the marine impact of, e.g., mining sediment resources, watershed development, pollution, rising sea level, and increased fishing. %B Abstracts with Programs - Geological Society of America %I Geological Society of America (GSA) : Boulder, CO, United States %C United States %V 42 %P 82 - 82 %8 2010/03/01/ %@ 00167592 %G eng %U https://gsa.confex.com/gsa/2010NE/finalprogram/abstract_170108.htm %N 11 %! Abstracts with Programs - Geological Society of America %0 Conference Proceedings %B Abstracts with Programs - Geological Society of America %D 1989 %T Ground truth? Relationship between lineaments and bedrock fabric %A Stephen B Mabee %A Hardcastle, Kenneth C. %A Donald U Wise %K #StaffPubs %K aerial photography %K BEDROCK %K fabric %K faults %K fractures %K granites %K ground truth %K igneous rocks %K joints %K lineaments %K Maine %K orientation %K pegmatite %K plutonic rocks %K quartz veins %K SLAR %K structural analysis %K Structural geology %K Structural geology 16 %K United States %K veins %B Abstracts with Programs - Geological Society of America %I Geological Society of America (GSA) : Boulder, CO, United States %C United States %V 21 %P A68 - A68 %8 1989/01/01/ %@ 00167592 %G eng %N 66 %! Abstracts with Programs - Geological Society of America %0 Conference Proceedings %B Abstracts with Programs - Geological Society of America %D 1993 %T Lineaments; their value in assessing regional groundwater availability and quality in bedrock aquifers of glaciated metamorphic terrains; a case study %A Stephen B Mabee %K #StaffPubs %K amphibolite %K aquifers %K Atlantic Coastal Plain %K BEDROCK %K central Maine %K fractures %K Georgetown Maine %K ground water %K hydraulic conductivity %K hydrogeology %K lineaments %K Maine %K metamorphic rocks %K structural controls %K United States %K water quality %B Abstracts with Programs - Geological Society of America %I Geological Society of America (GSA) : Boulder, CO, United States %C United States %V 25 %P 35 - 35 %8 1993/03/01/ %@ 00167592 %G eng %N 22 %! Abstracts with Programs - Geological Society of America %0 Journal Article %J Ground Water Management %D 1990 %T Correlation of lineaments and bedrock fracture fabric; implications for regional fractured-bedrock aquifer studies, preliminary results from Georgetown, Maine %A Stephen B Mabee %A Hardcastle, Kenneth C. %A Donald U Wise %K #StaffPubs %K aquifers %K fractured materials %K fractures %K geophysical surveys %K Georgetown Maine %K ground water %K hydrogeology %K Hydrogeology 21 %K imagery %K Maine %K remote sensing %K Sagadahoc County Maine %K SLAR %K surveys %K United States %B Ground Water Management %I Water Well Journal Pub. Co. : Dublin, OH, United States %C United States %V 3 %P 283 - 297 %8 1990/01/01/ %@ 10479023 %G eng %U http://info.ngwa.org/gwol/pdf/900156672.PDF %! Ground Water Management %0 Journal Article %J Ground Water %D 1999 %T Factors influencing well productivity in glaciated metamorphic rocks %A Stephen B Mabee %K #StaffPubs %K aquifers %K BEDROCK %K controls %K depth %K drinking water %K fractures %K Georgetown Island %K glacial environment %K ground water %K Hydrogeology 21 %K Maine %K metamorphic rocks %K porosity %K surface water %K thickness %K topography %K transmissivity %K United States %K water wells %B Ground Water %I National Water Well Association, Ground-Water Technology Division : Urbana, IL, United States %C United States %V 37 %P 88 - 97 %8 1999/02/01/ %@ 0017467X %G eng %U http://onlinelibrary.wiley.com/doi/10.1111/j.1745-6584.1999.tb00961.x/abstract %N 11 %! Ground Water %0 Journal Article %J Ground Water %D 1994 %T A method of collecting and analyzing lineaments for regional-scale fractured-bedrock aquifer studies %A Stephen B Mabee %A Hardcastle, Kenneth C. %A Donald U Wise %K #StaffPubs %K aquifers %K BEDROCK %K coastal environment %K fractured materials %K Georgetown Island %K ground water %K Hydrogeology 21 %K Knox County Maine %K lineaments %K Maine %K mapping %K mathematical methods %K processes %K tectonics %K United States %X A new method is proposed for collecting and reducing large collections of lineament data. The method consists of three steps: (1) collection of lineament data using multiple observers, multiple observation trials, and several types of imagery; (2) reproducibility tests; and (3) domain overlap analysis. Collection of lineament data and reproducibility tests are performed by overlaying lineament maps drawn by several observers or by superimposing multiple maps prepared by a single observer and identifying lineaments which are coincident (coincident lineaments = lineaments that have azimuths within 5 ± and separation distances are within 1–2 mm at the scale of drawing). Domain overlap analysis is accomplished by measuring the trends of near-vertical fractures at outcrops distributed over the study region and comparing the spatial distribution of these trends with similar-trending coincident lineaments. Lineaments that are not reproducible and are not geographically correlative with fractures are considered unimportant and removed from the data base. The method was applied to a 44 km2 study area in Maine and resulted in a reduction in the lineament data base from 6500 to 217. Transmissivities determined for bedrock wells located within 30 meters of lineaments that are both reproducible and geographically correlative with outcrop-scale fractures are generally higher than the transmissivities of wells located near lineaments that are not separated on the basis of these criteria. Application of the method serves as an important filter by providing a more manageable lineament data base from which to begin detailed field checking and/or geophysical surveys directed toward specific lineaments. %B Ground Water %I National Water Well Association, Ground-Water Technology Division : Urbana, IL, United States %C United States %V 32 %P 884 - 894 %8 1994/12/01/ %@ 0017467X %G eng %U http://onlinelibrary.wiley.com/doi/10.1111/j.1745-6584.1994.tb00928.x/abstract %N 66 %! Ground Water