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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Canada
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Eastern Canada
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Quebec
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Horne Mine (1)
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Montreal and Jesus Islands County Quebec
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Montreal Quebec (1)
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Noranda Quebec (1)
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Temiscamingue County Quebec
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Rouyn Quebec (1)
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Hudson Bay Lowlands (1)
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North America
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Appalachians (1)
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Saint Lawrence Lowlands (2)
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Saint Lawrence Valley (1)
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elements, isotopes
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carbon
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C-13/C-12 (1)
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C-14 (1)
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hydrogen
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D/H (1)
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deuterium (1)
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isotope ratios (1)
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isotopes
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radioactive isotopes
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C-14 (1)
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stable isotopes
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C-13/C-12 (1)
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Cenozoic
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upper Pleistocene
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Wisconsinan
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lower Wisconsinan (1)
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upper Wisconsinan (1)
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upper Quaternary (2)
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Laurentide ice sheet (2)
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Primary terms
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absolute age (1)
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atmosphere (1)
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Canada
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Eastern Canada
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Quebec
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Horne Mine (1)
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Montreal and Jesus Islands County Quebec
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Montreal Quebec (1)
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Noranda Quebec (1)
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Temiscamingue County Quebec
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Rouyn Quebec (1)
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Hudson Bay Lowlands (1)
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carbon
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C-13/C-12 (1)
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C-14 (1)
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Cenozoic
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Quaternary
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Holocene (1)
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Pleistocene
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upper Pleistocene
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Sangamonian (1)
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Wisconsinan
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lower Wisconsinan (1)
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upper Wisconsinan (1)
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upper Quaternary (2)
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ecology (1)
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geochemistry (1)
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geophysical methods (1)
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glacial geology (2)
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hydrogen
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D/H (1)
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deuterium (1)
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isotopes
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radioactive isotopes
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C-14 (1)
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stable isotopes
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C-13/C-12 (1)
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D/H (1)
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deuterium (1)
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North America
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Appalachians (1)
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Saint Lawrence Lowlands (2)
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Saint Lawrence Valley (1)
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paleoclimatology (1)
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paleogeography (1)
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pollution (1)
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sedimentary structures
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planar bedding structures
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varves (1)
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sediments
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clastic sediments
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outwash (1)
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till (3)
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sedimentary structures
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sedimentary structures
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planar bedding structures
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varves (1)
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sediments
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sediments
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clastic sediments
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outwash (1)
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till (3)
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The late Quaternary stratigraphic record northwest of Montréal: regional ice-sheet dynamics, ice-stream activity, and early deglacial events
Are industrial SO 2 emissions reducing CO 2 uptake by the boreal forest?
Late Winconsinan glacial dynamics, deglaciation, and marine invasion in southern Quebec
Ice-flow patterns and glacial transport in the eastern Hudson Bay region: implications for the late Quaternary dynamics of the Laurentide Ice Sheet
Sangamonian and early Wisconsinan events in the St. Lawrence Lowland and Appalachians of southern Quebec, Canada
In the St. Lawrence Lowland of southern Quebec, an early Wisconsinan glacial advance deposited the Levrard Till. This glacial event, known as the Nicolet Stade, is tentatively correlated with marine oxygen-isotope stage 4. Radiocarbon and thermoluminescence ages bracket the Nicolet Stade between 90 and 70 ka. This advance was preceded and followed by periods of free drainage during which were deposited the Lotbiniere Sand and St. Pierre Sediments, two nonglacial units dated at or beyond the limit of the radiocarbon method. Available evidence suggests that the Deschaillons Varves were deposited ca. 80 ka in a large glacial lake that was impounded in front of the Laurentide Ice Sheet as it advanced up the St. Lawrence Valley. In the Appalachian Uplands, fluvial and lacustrine sediments of the Massawippi Formation were probably deposited at the end of the Sangamonian Interglacial. These sediments underlie the Chaudiere Till, a unit in which the occurrence of distinctive lithological indicators is taken as evidence that a regional episode of westward to southwestward ice flow prevailed at the onset of the last glaciation. The proposed paleogeographic reconstruction suggests that the development of an independent ice cap in the northeastern Appalachians played a key role during the early part of the Wisconsinan Glaciation in southern Quebec. This independent ice mass flowed southwestward across the Appalachian Uplands of southern Quebec and eventually coalesced with the Laurentide Ice Sheet, which was advancing up the St. Lawrence Valley.