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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Green Mountains (1)
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North America
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Appalachians
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Catskill Mountains (1)
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Northern Appalachians (1)
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United States
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Eastern U.S. (1)
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Maine
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Piscataquis County Maine
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Mount Katahdin (6)
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New England (2)
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New Hampshire (2)
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New York
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Adirondack Mountains (1)
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Catskill Mountains (1)
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Vermont (1)
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White Mountains (1)
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elements, isotopes
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carbon
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C-14 (2)
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isotopes
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radioactive isotopes
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Al-26 (1)
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Be-10 (1)
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C-14 (2)
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metals
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alkaline earth metals
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beryllium
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Be-10 (1)
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aluminum
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Al-26 (1)
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geochronology methods
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exposure age (1)
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U/Pb (1)
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geologic age
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Cenozoic
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Quaternary
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Pleistocene
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upper Pleistocene
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Wisconsinan
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upper Wisconsinan (1)
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upper Quaternary (1)
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Laurentide ice sheet (1)
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Paleozoic
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Devonian
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Lower Devonian
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Emsian (1)
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igneous rocks
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igneous rocks
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plutonic rocks
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gabbros (1)
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Primary terms
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absolute age (2)
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carbon
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C-14 (2)
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Cenozoic
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Quaternary
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Pleistocene
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upper Pleistocene
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Wisconsinan
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upper Wisconsinan (1)
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upper Quaternary (1)
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geochronology (1)
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geomorphology (1)
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glacial geology (3)
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igneous rocks
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plutonic rocks
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gabbros (1)
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-
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intrusions (1)
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isotopes
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radioactive isotopes
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Al-26 (1)
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Be-10 (1)
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C-14 (2)
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-
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metals
-
alkaline earth metals
-
beryllium
-
Be-10 (1)
-
-
-
aluminum
-
Al-26 (1)
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-
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North America
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Appalachians
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Catskill Mountains (1)
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Northern Appalachians (1)
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orogeny (1)
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paleogeography (1)
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Paleozoic
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Devonian
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Lower Devonian
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Emsian (1)
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sea-level changes (1)
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sedimentary rocks
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clastic rocks (1)
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sedimentation (1)
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sediments (2)
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tectonics (1)
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United States
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Eastern U.S. (1)
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Maine
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Piscataquis County Maine
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Mount Katahdin (6)
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-
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New England (2)
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New Hampshire (2)
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New York
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Adirondack Mountains (1)
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Catskill Mountains (1)
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Vermont (1)
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-
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sedimentary rocks
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flysch (1)
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molasse (1)
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sedimentary rocks
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clastic rocks (1)
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-
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sediments
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sediments (2)
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Mount Katahdin
Cold-based Laurentide ice covered New England’s highest summits during the Last Glacial Maximum
Emsian Synorogenic Paleogeography of the Maine Appalachians
Reconstructions of mountain glacier profiles, northeastern United States
Styles of deglaciation in central Maine
The recession of the late Wisconsinan ice sheet from central Maine was characterized by several modes of deglaciation. Below the limit of marine submergence in the Augusta-Skowhegan area, the retreat of the ice margin is documented by end moraines. A DeGeer-type esker system and accompanying marine deltas were deposited in a succession of narrow, topographically controlled zones of stagnant ice that bordered the active ice margin. Immediately inland from the marine limit, glaciofluvial deposits were graded to the sea. Examples occur in the Pleasant, Piscataquis, and upper Kennebec River Valleys. The large volumes of these deposits and the presence of morphosequences suggest that they were derived from active ice standing a short distance inland from the sea. However, in certain areas, as between Dexter and Guilford, melting of large stagnant ice blocks produced little or no waterlaid sediment. Moraines are also present above the marine limit although their significance in determining ice-marginal positions is not well understood. They are particularly characteristic of basins underlain by phaneritic plutonic rocks. Glaciofluvial and lacustrine deposits in northwestern Maine and the deposits of small cirque glaciers on Mt. Katahdin are among the youngest glacial deposits within the study area.