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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Indian Peninsula
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India
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Andhra Pradesh India
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Cuddapah Basin (1)
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Vindhyan Basin (1)
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Europe
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Western Europe
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France
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Vosges France (1)
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North America (1)
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North Slope (1)
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United States
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Alaska (1)
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Maryland
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Harford County Maryland
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Aberdeen Proving Ground (1)
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elements, isotopes
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isotope ratios (1)
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isotopes
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stable isotopes
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S-34/S-32 (1)
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oxygen (1)
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sulfur
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S-34/S-32 (1)
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fossils
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Chordata
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Vertebrata
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Tetrapoda
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Mammalia
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Theria
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Eutheria
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Perissodactyla (1)
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Reptilia
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Diapsida
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Archosauria
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Crocodilia (1)
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dinosaurs
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Ornithischia
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Ceratopsia
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Ceratopsidae
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Triceratops (1)
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tracks (1)
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geologic age
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Cenozoic
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Quaternary (1)
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Mesozoic
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Cretaceous
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Upper Cretaceous
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Campanian (1)
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Maestrichtian (1)
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Senonian (1)
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Paleozoic
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lower Paleozoic
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Glenarm Series (1)
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Precambrian
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upper Precambrian
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Proterozoic
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Mesoproterozoic (1)
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minerals
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sulfates (1)
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sulfides
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pyrite (1)
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Primary terms
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Asia
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Indian Peninsula
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India
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Andhra Pradesh India
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Cuddapah Basin (1)
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Vindhyan Basin (1)
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biogeography (1)
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Cenozoic
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Quaternary (1)
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Chordata
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Vertebrata
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Tetrapoda
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Mammalia
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Theria
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Eutheria
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Perissodactyla (1)
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-
-
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Reptilia
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Diapsida
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Archosauria
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Crocodilia (1)
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dinosaurs
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Ornithischia
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Ceratopsia
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Ceratopsidae
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Triceratops (1)
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Europe
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Western Europe
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France
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Vosges France (1)
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fractures (1)
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geochemistry (1)
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geophysical methods (1)
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ground water (2)
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hydrogeology (1)
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isotopes
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stable isotopes
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S-34/S-32 (1)
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Mesozoic
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Cretaceous
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Upper Cretaceous
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Campanian (1)
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Maestrichtian (1)
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Senonian (1)
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North America (1)
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oxygen (1)
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paleoclimatology (1)
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paleoecology (2)
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paleontology (1)
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Paleozoic
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lower Paleozoic
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Glenarm Series (1)
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petrology (1)
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Precambrian
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upper Precambrian
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Proterozoic
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Mesoproterozoic (1)
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remote sensing (1)
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sea water (1)
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sedimentary rocks (1)
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springs (1)
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stratigraphy (1)
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sulfur
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S-34/S-32 (1)
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thermal waters (1)
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United States
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Alaska (1)
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Maryland
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Harford County Maryland
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Aberdeen Proving Ground (1)
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sedimentary rocks
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sedimentary rocks (1)
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sedimentary structures
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tracks (1)
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Mesoproterozoic sulphidic ocean, delayed oxygenation and evolution of early life: sulphur isotope clues from Indian Proterozoic basins
Abstract Research by the U.S. Army Corps of Engineers at numerous military facilities has shown that a regional geologic approach is the key to cost-effective risk assessment and environmental remediation. This approach addresses the needs of the facility by placing it directly in the larger framework of the land, water, and the people off post who comprise potential contaminant receptors. Application of a regional geologic framework to a large military facility requires extensive research and focused study to establish the overall picture. A regional geologic and geomorphic model was developed for the Aberdeen Proving Ground (APG), located in the headwaters of Chesapeake Bay near Aberdeen, Maryland, USA. Regional geologic information and interpretation of data from over 2000 geologic and water well borings indicate that APG is situated upon Pleistocene terraces of the ancestral Susquehanna River, which unconformably overlie Cretaceous unconsolidated sediments. Pleistocene terraces represent estuarine and fluvial filling of an earlier manifestation of Chesapeake Bay during interglacial periods of high sea level during the past 1.5 m.y. During episodes of low sea level, corresponding to glacial maxima, the Susquehanna River downcut into Pleistocene and Cretaceous deposits. The remnants of at least three and possibly four separate filling cycles, ranging from middle Wisconsin to early Pleistocene in age (youngest to oldest), are present at APG. The geologic and geomorphic model of APG is being used to define aquifer limits and to assess the movement of groundwater for potential impacts to public drinking water supplies on the Aberdeen Peninsula and to Chesapeake Bay.