A high-resolution sedimentology and age determination of core PS2185 from the central Arctic Ocean
A high-resolution multiparameter stratigraphy allows the identification of late Quaternary glacial and interglacial cycles in a central Arctic Ocean sediment core. Distinct sandy layers in the upper part of the otherwise fine-grained sediment core from the Lomonosov Ridge (lat 87.5°N) correlate to f...
Main Authors: | , , , , , , , , , , , , , , |
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Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
1997
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Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.728693 https://doi.org/10.1594/PANGAEA.728693 |
Summary: | A high-resolution multiparameter stratigraphy allows the identification of late Quaternary glacial and interglacial cycles in a central Arctic Ocean sediment core. Distinct sandy layers in the upper part of the otherwise fine-grained sediment core from the Lomonosov Ridge (lat 87.5°N) correlate to four major glacials since ca. 0.7 Ma. The composition of these ice-rafted terrigenous sediments points to a glaciated northern Siberia as the main source. In contrast, lithic carbonates derived from North America are also present in older sediments and indicate a northern North American glaciation since at least 2.8 Ma. We conclude that large-scale northern Siberian glaciation began much later than other Northern Hemisphere ice sheets. |
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