Deglaciation and shoreline displacement on Alexandra Land, Franz Josef Landстатья

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[1] Glazovskiy A., Naslund J. O., Zale R. Deglaciation and shoreline displacement on alexandra land, franz josef land // Geografiska Annaler, Series A: Physical Geography. — 1992. — Vol. 74, no. 4. — P. 283–293. 14C datings of driftwood from raised beaches on the island Alexandra Land, Franz Josef Land, Russia, indicate deglaciation by 6800 14C years BP. The age of a diamicton containing small shell fragments, found beneath a beach ridge formed c. 5000 BP, has been dated to 8265 14C years BP (age after sea correction 7755 BP), suggesting that Alexandra Land was at least partly deglaciated by that time. The deposit containing shell fragments has been interpreted as a till which, if the interpretation is correct, indicates that a glacial advance occurred sometime between 7800 and 6800 BP. A shoreline displacement curve has been constructed for Alexandra Land. The rate of shore displacement since 6800 BP is calculated to 0.3 m/100 years. No pumice was found on Alexandra Land. Lunar Ice Cap on Alexandra Land was smaller than it is at present when the highest shoreline was formed, 6800 BP. The large scale bedrock topography and the orientation of elonagated bedrock basins seem to indicate ice flow in a southeast to northwest direction. [ DOI ]

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