Major ice sheet response in eastern New England to a cold North Atlantic region, ca. 16-15 cal ka BP

Publication Type  Journal Article
Year of Publication  2007
Authors  Kaplan, M. R.
Journal Title  Quaternary Research
Volume  68
Issue  2
Pages  280-283
Journal Date  Sep
ISBN Number  0033-5894
Accession Number  ISI:000249281600012
Key Words  paleoclimatology; maine; glacial geology; paleoceanography; radiocarbon; maine

A large ice sheet still covered almost all of Maine and eastern New England until ca. 15 cal ka BP, reaching south of 45 degrees S, despite rising summer insolation intensity and major ice recession elsewhere outside the North Atlantic region. Furthermore, the well-studied moraine belt along eastern coastal Maine, including the prominent Pineo Ridge delta/moraine complex and Pond Ridge moraine, indicates repeated readvances and stillstands between ca. 16 and 15 cal ka BP. This moraine belt reflects a considerable ice sheet response over eastern North America during this time period, coeval with the latter half of the European Oldest Dryas period. Moraine deposition was concurrent with reduction or elimination of North Atlantic meridional overturning, starting with the earlier onset of peak IRD and Heinrich Event 1 (HE-1). The existing C-14 chronology suggests that the coastal moraine belt and the persistence of the ice sheet until similar to 15 cal ka BP was a response to the severe cooling of the North Atlantic region after similar to 17 cal ka BP. (c) 2007 University of Washington. All rights reserved.


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URL  <Go to ISI>://000249281600012
DOI  DOI 10.1016/j.yqres.2007.06.003