TY - JOUR

T1 - Comparison of the glacial chronology of Eastern Baffin Island, East Greenland and Camp century accumulation record

AU - Andrews, John

AU - Funder, Svend Visby

AU - Hjort, Chritian

AU - Imbrie, John

PY - 1974

Y1 - 1974

N2 - Independently derived glacial chronologies from eastern Baffin Island, Canadian Arctic, and from East Greenland show essentially similar glaciologic trends that arc notably different from the response of the southern margins of the Laurentide and FCllnoscandia Ice Sheets. The critical aspe~ts of both chronologies and the related extcn t of the ice sheets are (1) an early and maximum glacial stade, during the early phase of the last glaciation, reaching its peak abqut 100,000 to 75,000 yr ago; (2) an in terstadial about .70,000 n.p.; (3) an ice advance peaking about 45,000 yr ago; (4) an interval about 40,000 to 11,000 yr ago of restricted ice extent; and (5) a late glacial sladial belween 11,000 and 8,000 B.P. This record shows basic agreement with a chronology of snow accumulation at the Camp Century ice core site based on a revised chronostratigraphic interpretation. Fluctuations in sea level between 120,000 and 70,000 B.P. may well be related to glacierization of high arctic land masses under conditions of heavy snowfall. The subsequent reduction of accumulation in these high arctic areas then leads to a reduction of ice volume with a dry, cold interstadial correlative in time with the "classical" Wisconsin ice advance along the southern margins. The late glacial advance of both eastern Baffin Island and East Greenland, which extended into Holocene time, represents a brief return to high accumulation rates as the global circulation changed from a glacial to an interglacial mode.

AB - Independently derived glacial chronologies from eastern Baffin Island, Canadian Arctic, and from East Greenland show essentially similar glaciologic trends that arc notably different from the response of the southern margins of the Laurentide and FCllnoscandia Ice Sheets. The critical aspe~ts of both chronologies and the related extcn t of the ice sheets are (1) an early and maximum glacial stade, during the early phase of the last glaciation, reaching its peak abqut 100,000 to 75,000 yr ago; (2) an in terstadial about .70,000 n.p.; (3) an ice advance peaking about 45,000 yr ago; (4) an interval about 40,000 to 11,000 yr ago of restricted ice extent; and (5) a late glacial sladial belween 11,000 and 8,000 B.P. This record shows basic agreement with a chronology of snow accumulation at the Camp Century ice core site based on a revised chronostratigraphic interpretation. Fluctuations in sea level between 120,000 and 70,000 B.P. may well be related to glacierization of high arctic land masses under conditions of heavy snowfall. The subsequent reduction of accumulation in these high arctic areas then leads to a reduction of ice volume with a dry, cold interstadial correlative in time with the "classical" Wisconsin ice advance along the southern margins. The late glacial advance of both eastern Baffin Island and East Greenland, which extended into Holocene time, represents a brief return to high accumulation rates as the global circulation changed from a glacial to an interglacial mode.

M3 - Tidsskriftartikel

VL - 2

SP - 355

EP - 358

JO - Geology

JF - Geology

SN - 0534-0101

ER -