
Helena Alexanderson
Professor

An interglacial polar bear and an early Weichselian glaciation at Poolepynten, western Svalbard
Författare
Summary, in English
The recent discovery of a subfossil polar bear (Ursus maritimus) jawbone in the Poolepynten coastal cliff sequence, western Svalbard, and its implications for the natural history of the polar bear motivated an effort to better constrain the environmental history and age envelope of the Poolepynten sediment sequence. The focus of the present study is on the lithostratigraphy of the coastal cliffs and on re-dating the sequence using the Optically Stimulated Luminescence (OSL) dating technique. We report a revised lithostratigraphy and nine new OSL ages. It is concluded that the Poolepynten sequence contains evidence of four regional glaciation events, recorded in the strata as erosional unconformities or glacial deposits followed by shallow-marine deposition signifying transgressions and subsequent glacio-isostatic rebound and regression. Our OSL ages refine previous age determinations (14C and IRSL) and support the interpretation that the subfossil polar bear jawbone is probably of last interglacial (Eemian) age.
Avdelning/ar
- Kvartärgeologi
Publiceringsår
2013
Språk
Engelska
Sidor
532-543
Publikation/Tidskrift/Serie
Boreas
Volym
42
Issue
3
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
John Wiley & Sons Inc.
Ämne
- Geology
Aktiv
Published
Projekt
- Glacial history of Svalbard
Forskningsgrupp
- Lund Luminescence Laboratory
ISBN/ISSN/Övrigt
- ISSN: 1502-3885