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Abstract
The Bilchenok Glacier in the central part of the Kamchatka Peninsula is located on the Ushkovsky Volcano (3900 m a.s.1.) and is regarded as a surging glacier. A tephrochronological study reveals Holocene fluctuations of the Bilchenok Glacier. Field survey and satellite and aerial photo interpretation indicate that five groups (moraines a to e) of moraines are present around the Bilchenok Glacier. Stratigraphic relationships among glacial deposits and marker tephras define the age of each moraine. Three glacial advances during the Neoglacial period are estimated to have occurred at 8 ka BP, 3 ka BP, and 1 ka BP. The glacier possibly expanded at 2 ka BP. No glacial landforms in the Little Ice Age were identified. Glacier expansion during the Little Ice Age was, therefore, on a smaller scale than that of glacial surges in the 1960s, and the other Holocene advances.
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