Postglacial emergence and Late Quaternary glaciation on northern Novaya Zemlya, Arctic Russia |
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| Authors: | STEVEN L FORMAN DAVID J LUBINSKI JACOBUS J ZEEBERG LEONID POLYAK GIFFORD H MILLER GENNADY MATISHOV GENNADY TARASOV |
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| Institution: | Department of Earth and Environmental Sciences, 845 W. Taylor St., University of Illinois, Chicago, IL 60607–7059, USA;Institute of Arctic and Alpine Research and Dept. of Geological Sciences, University of Colorado, Boulder, CO 80309–0450, USA;Byrd Polar Research Center, The Ohio State University, Columbus, OH 43210–1002, USA;Murmansk Marine Biological institute 17, Vladimirskaya St., Murmansk, 183010, Russia |
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| Abstract: | Recent observations on postglacial emergence and past glacier extent for one of the least accessible areas in the Arctic, northern Novaya Zemlya are here united. The postglacial marine limit formed 5 to 6 ka is registered on the east and west coasts of the north island at 10 ± 1 and 18 ± 2 m aht, respectively. This modest and late isostatic response along with deglacial ages of >9.2 ka on adjacent marine cores from the northern Barents Sea indicate either early (>13 ka) deglaciation or modest ice sheet loading (<1500 m thick ice sheet) of Novaya Zemlya. Older and higher (up to 50 m aht) raised beaches were identified beneath a discontinuous glacial drift. Shells from the drift and underlying sublittoral sediments yield minimum limiting 14C ages of 26 to 30 ka on an earlier deglacial event(s). The only moraines identified are within 4 km of present glacier margins and reflect at least three neoglacial advances in the past 2.4 ka. |
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