A Late Younger Dryas-Early Holocene tephrostratigraphy for Fosen, Central Norway
A number of rapid climate oscillations occur during the Lateglacial–Early Holocene, 15–8 ka BP period and a well-developed tephrostratigraphy in association with these oscillations increases the possibilities to correlate climate archives around the North Atlantic. This paper presents a tephrostrati...
Published in: | Journal of Quaternary Science |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley-Blackwell
2013
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Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/43859/ https://oceanrep.geomar.de/id/eprint/43859/1/Lind.pdf https://oceanrep.geomar.de/id/eprint/43859/2/LindSup1.docx https://oceanrep.geomar.de/id/eprint/43859/3/LindSup2.docx https://doi.org/10.1002/jqs.2676 |
Summary: | A number of rapid climate oscillations occur during the Lateglacial–Early Holocene, 15–8 ka BP period and a well-developed tephrostratigraphy in association with these oscillations increases the possibilities to correlate climate archives around the North Atlantic. This paper presents a tephrostratigraphy for Fosen peninsula, Central Norway. Both the Vedde Ash ca.12.1 ka BP and the Saksunarvatn Ash ~10.3 ka BP are important isochrones for correlations of Late Quaternary palaeoenvironmental records in the North Atlantic region and have been assigned ages in GICC05. Beside these tephras we have also identified a new tephra, the Fosen Tephra, with a Borrobol-type geochemistry that occurs above both the Vedde Ash and the Saksunarvatn Ash with an age ~10.2 ka BP. Several tephras with Borrobol-type geochemistry have been identified around the North Atlantic. One group is the Borrobol/Penifiler tephras dated to Greenland Interstadial-1 and another group is dated to the Early Holocene. We suggest that some of the Early Holocene Borrobol-type tephras and the Fosen Tephra may actually be the same layer. If so, the Fosen Tephra is spread over a large area of the North Atlantic and has the potential to become an important marker for short-term climate variability in Scandinavia and in the northern hemisphere. |
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