Arctic ocean evidence for late Quaternary initiation of northern Eurasian ice sheets

Robert F. Spielhagen, Georges Bonani, Anton Eisenhauer, Martin Frank, Thomas Frederichs, Heidemarie Kassens, Peter W. Kubik, Augusto Mangini, Niels Nørgaard-Pedersen, Norbert R. Nowaczyk, Stefan Schäper, Ruediger Stein, Jörn Thiede, Ralf Tiedemann, Monika Wahsner

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

94 Citationer (Scopus)

Abstrakt

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.

OriginalsprogEngelsk
Sider (fra-til)783-786
Antal sider4
TidsskriftGeology
Vol/bind25
Udgave nummer9
DOI
StatusUdgivet - sep. 1997
Udgivet eksterntJa

Programområde

  • Programområde 5: Natur og klima

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