Fluctuations of the weichselian ice sheet in SW Iceland: A glaciomarine sequence from sudurnes, seltjarnarnes
1997; Elsevier BV; Volume: 16; Issue: 2 Linguagem: Inglês
10.1016/s0277-3791(96)00052-2
ISSN1873-457X
AutoresJón Eiríksson, Leifur A. Símonarson, Karen Luise Knudsen, Peter Kristensen,
Tópico(s)Methane Hydrates and Related Phenomena
ResumoSedimentological and palaeontological studies in Reykjavík, SW Iceland, show that the glaciation history during the Late Pleistocene was characterized by a fluctuating glacier flowing WNW from Reykjanes Peninsula. New 14C dates show that marine deposition took place in coastal regions during at least three interstadials, corresponding to the Ålesund, the Bølling, and the Allerød in Scandinavia. The oldest of these interstadials is dated to ca. 28,000 14C years BP and represents the oldest Weichselian interstadial registered in Iceland up to now. Recent studies in Gardabær, SW Iceland, show marine transgression during the Bølling. Earlier work in Fossvogur, Reykjavík, indicates that the Allerød-Younger Dryas boundary did not coincide with a marked change in the water masses in SW Iceland. Sedimentological studies reveal a relatively high energy environment with near-shore and glaciomarine deposition and a period of glacial expansion during the Younger Dryas. The macrofauna, foraminifera, and ostracod faunas from sediments dated to the late Younger Dryas on Sudumes have been analysed and indicate low arctic to high boreal conditions. The Sudumes data show that the Younger Dryas glaciation in the Reykjav$́area took place in a glaciomarine environment. The youngest dated sediments of the Sudurnes sequence probably postdate this glacier expansion.
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