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Driftwood in the Eemian interglacial lacustrine unit from the Faroe Islands and its possible source areas : palaeobotanical and ichnological analysis

Pokorný, Richard ; Koutecký, Vít ; Björck, Svante LU ; Krmíček, Lukáš ; Árting, Uni E. and Štofik, Marcel (2018) In Boreas 47(4). p.1230-1243
Abstract

The coastal cliffs in Klaksvík (Borðoyar Bay) are the only known locality with Eemian sediments in the Faroe Islands. Previous studies carried out there focused on the sedimentology, tephra chemistry, paleoecology including aquatic environment, or the age of the deposits. In the lacustrine, clayey to silty gyttja we collected scattered wood fragments, identified as Larix sp., Pinus sp., Taxus sp. and Betulaceae? In addition, these wood remains contain numerous trace fossils, made by marine wood-boring bivalves (Teredolites longissimus), which together with a discussion about the areal extent of the identified tree species leads us to conclude that they are non-native, i.e. driftwood. Northern Siberia is usually regarded as the most... (More)

The coastal cliffs in Klaksvík (Borðoyar Bay) are the only known locality with Eemian sediments in the Faroe Islands. Previous studies carried out there focused on the sedimentology, tephra chemistry, paleoecology including aquatic environment, or the age of the deposits. In the lacustrine, clayey to silty gyttja we collected scattered wood fragments, identified as Larix sp., Pinus sp., Taxus sp. and Betulaceae? In addition, these wood remains contain numerous trace fossils, made by marine wood-boring bivalves (Teredolites longissimus), which together with a discussion about the areal extent of the identified tree species leads us to conclude that they are non-native, i.e. driftwood. Northern Siberia is usually regarded as the most likely source area for driftwood in the eastern North Atlantic region. We combined the approximate transport distance from the areal extent of the wood with the main directions of marine currents in the relevant section of the North Atlantic. Adding the known average marine current velocities during the penultimate interglacial resulted in 130–200 days for transport from North America and 350–1100 days from Siberia. Comparing this with the maximal buoyancy period for the identified tree species, we conclude that the Faroese driftwood may originate not only from Siberia, but also from the eastern coast of North America, especially from the region around the Great Lakes, as well as from western Europe.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Boreas
volume
47
issue
4
pages
14 pages
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85053466447
ISSN
0300-9483
DOI
10.1111/bor.12332
language
English
LU publication?
yes
id
3e4a7e7d-1e31-4a47-a01e-83d0d45f67ba
date added to LUP
2018-10-10 10:28:20
date last changed
2021-08-18 03:56:11
@article{3e4a7e7d-1e31-4a47-a01e-83d0d45f67ba,
  abstract     = {<p>The coastal cliffs in Klaksvík (Borðoyar Bay) are the only known locality with Eemian sediments in the Faroe Islands. Previous studies carried out there focused on the sedimentology, tephra chemistry, paleoecology including aquatic environment, or the age of the deposits. In the lacustrine, clayey to silty gyttja we collected scattered wood fragments, identified as Larix sp., Pinus sp., Taxus sp. and Betulaceae? In addition, these wood remains contain numerous trace fossils, made by marine wood-boring bivalves (Teredolites longissimus), which together with a discussion about the areal extent of the identified tree species leads us to conclude that they are non-native, i.e. driftwood. Northern Siberia is usually regarded as the most likely source area for driftwood in the eastern North Atlantic region. We combined the approximate transport distance from the areal extent of the wood with the main directions of marine currents in the relevant section of the North Atlantic. Adding the known average marine current velocities during the penultimate interglacial resulted in 130–200 days for transport from North America and 350–1100 days from Siberia. Comparing this with the maximal buoyancy period for the identified tree species, we conclude that the Faroese driftwood may originate not only from Siberia, but also from the eastern coast of North America, especially from the region around the Great Lakes, as well as from western Europe.</p>},
  author       = {Pokorný, Richard and Koutecký, Vít and Björck, Svante and Krmíček, Lukáš and Árting, Uni E. and Štofik, Marcel},
  issn         = {0300-9483},
  language     = {eng},
  number       = {4},
  pages        = {1230--1243},
  publisher    = {John Wiley & Sons Inc.},
  series       = {Boreas},
  title        = {Driftwood in the Eemian interglacial lacustrine unit from the Faroe Islands and its possible source areas : palaeobotanical and ichnological analysis},
  url          = {http://dx.doi.org/10.1111/bor.12332},
  doi          = {10.1111/bor.12332},
  volume       = {47},
  year         = {2018},
}