A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska
A 40 cm thick primary bed of Old Crow tephra (131 ± 11 ka), an important stratigraphic marker in eastern Beringia, directly overlies a vegetated surface at Palisades West, on the Yukon River in central Alaska. Analyses of insect, bryophyte, and vascular plant macrofossils from the buried surface and...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | https://pure.qub.ac.uk/en/publications/a-latemiddle-pleistocene-marine-isotope-stage-6-vegetated-surface-buried-by-old-crow-tephra-at-the-palisades-interior-alaska(04411cb8-a6fa-42f6-be80-43c211cd1bb2).html https://doi.org/10.1016/j.quascirev.2009.12.003 http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-76649103362&md5=f70448085090e3b78f5e922cf94cc61a |
id |
ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/04411cb8-a6fa-42f6-be80-43c211cd1bb2 |
---|---|
record_format |
openpolar |
spelling |
ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/04411cb8-a6fa-42f6-be80-43c211cd1bb2 2023-05-15T17:52:45+02:00 A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska Reyes, A.V. Jensen, B.J.L. Zazula, G.D. Ager, T.A. Kuzmina, S. La Farge, C. Froese, D.G. 2010-03-01 https://pure.qub.ac.uk/en/publications/a-latemiddle-pleistocene-marine-isotope-stage-6-vegetated-surface-buried-by-old-crow-tephra-at-the-palisades-interior-alaska(04411cb8-a6fa-42f6-be80-43c211cd1bb2).html https://doi.org/10.1016/j.quascirev.2009.12.003 http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-76649103362&md5=f70448085090e3b78f5e922cf94cc61a eng eng info:eu-repo/semantics/restrictedAccess Reyes , A V , Jensen , B J L , Zazula , G D , Ager , T A , Kuzmina , S , La Farge , C & Froese , D G 2010 , ' A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska ' , Quaternary Science Reviews , vol. 29 , no. 5-6 , pp. 801-811 . https://doi.org/10.1016/j.quascirev.2009.12.003 /dk/atira/pure/subjectarea/asjc/1100/1105 Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 Geology /dk/atira/pure/subjectarea/asjc/2300/2306 Global and Planetary Change /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water article 2010 ftqueensubelpubl https://doi.org/10.1016/j.quascirev.2009.12.003 2022-02-09T22:08:12Z A 40 cm thick primary bed of Old Crow tephra (131 ± 11 ka), an important stratigraphic marker in eastern Beringia, directly overlies a vegetated surface at Palisades West, on the Yukon River in central Alaska. Analyses of insect, bryophyte, and vascular plant macrofossils from the buried surface and underlying organic-rich silt suggest the local presence of an aquatic environment and mesic shrub-tundra at the time of tephra deposition. Autochthonous plant and insect macrofossils from peat directly overlying Old Crow tephra suggest similar aquatic habitats and hydric to mesic tundra environments, though pollen counts indicate a substantial herbaceous component to the regional tundra vegetation. Trace amounts of arboreal pollen in sediments associated with the tephra probably reflect reworking from older deposits, rather than the local presence of trees. The revised glass fission-track age for Old Crow tephra places its deposition closer to the time of the last interglaciation than earlier age determinations, but stratigraphy and paleoecology of sites with Old Crow tephra indicate a late Marine Isotope Stage 6 age. Regional permafrost degradation and associated thaw slumping are responsible for the close stratigraphic and paleoecological relations between Old Crow tephra and last interglacial deposits at some sites in eastern Beringia. Article in Journal/Newspaper Old Crow permafrost Tundra Yukon river Alaska Beringia Yukon Queen's University Belfast Research Portal Palisades ENVELOPE(159.167,159.167,-82.833,-82.833) The Palisades ENVELOPE(159.167,159.167,-82.833,-82.833) Yukon Quaternary Science Reviews 29 5-6 801 811 |
institution |
Open Polar |
collection |
Queen's University Belfast Research Portal |
op_collection_id |
ftqueensubelpubl |
language |
English |
topic |
/dk/atira/pure/subjectarea/asjc/1100/1105 Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 Geology /dk/atira/pure/subjectarea/asjc/2300/2306 Global and Planetary Change /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/subjectarea/asjc/1100/1105 Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 Geology /dk/atira/pure/subjectarea/asjc/2300/2306 Global and Planetary Change /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water Reyes, A.V. Jensen, B.J.L. Zazula, G.D. Ager, T.A. Kuzmina, S. La Farge, C. Froese, D.G. A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska |
topic_facet |
/dk/atira/pure/subjectarea/asjc/1100/1105 Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 Geology /dk/atira/pure/subjectarea/asjc/2300/2306 Global and Planetary Change /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
description |
A 40 cm thick primary bed of Old Crow tephra (131 ± 11 ka), an important stratigraphic marker in eastern Beringia, directly overlies a vegetated surface at Palisades West, on the Yukon River in central Alaska. Analyses of insect, bryophyte, and vascular plant macrofossils from the buried surface and underlying organic-rich silt suggest the local presence of an aquatic environment and mesic shrub-tundra at the time of tephra deposition. Autochthonous plant and insect macrofossils from peat directly overlying Old Crow tephra suggest similar aquatic habitats and hydric to mesic tundra environments, though pollen counts indicate a substantial herbaceous component to the regional tundra vegetation. Trace amounts of arboreal pollen in sediments associated with the tephra probably reflect reworking from older deposits, rather than the local presence of trees. The revised glass fission-track age for Old Crow tephra places its deposition closer to the time of the last interglaciation than earlier age determinations, but stratigraphy and paleoecology of sites with Old Crow tephra indicate a late Marine Isotope Stage 6 age. Regional permafrost degradation and associated thaw slumping are responsible for the close stratigraphic and paleoecological relations between Old Crow tephra and last interglacial deposits at some sites in eastern Beringia. |
format |
Article in Journal/Newspaper |
author |
Reyes, A.V. Jensen, B.J.L. Zazula, G.D. Ager, T.A. Kuzmina, S. La Farge, C. Froese, D.G. |
author_facet |
Reyes, A.V. Jensen, B.J.L. Zazula, G.D. Ager, T.A. Kuzmina, S. La Farge, C. Froese, D.G. |
author_sort |
Reyes, A.V. |
title |
A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska |
title_short |
A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska |
title_full |
A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska |
title_fullStr |
A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska |
title_full_unstemmed |
A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska |
title_sort |
late-middle pleistocene (marine isotope stage 6) vegetated surface buried by old crow tephra at the palisades, interior alaska |
publishDate |
2010 |
url |
https://pure.qub.ac.uk/en/publications/a-latemiddle-pleistocene-marine-isotope-stage-6-vegetated-surface-buried-by-old-crow-tephra-at-the-palisades-interior-alaska(04411cb8-a6fa-42f6-be80-43c211cd1bb2).html https://doi.org/10.1016/j.quascirev.2009.12.003 http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-76649103362&md5=f70448085090e3b78f5e922cf94cc61a |
long_lat |
ENVELOPE(159.167,159.167,-82.833,-82.833) ENVELOPE(159.167,159.167,-82.833,-82.833) |
geographic |
Palisades The Palisades Yukon |
geographic_facet |
Palisades The Palisades Yukon |
genre |
Old Crow permafrost Tundra Yukon river Alaska Beringia Yukon |
genre_facet |
Old Crow permafrost Tundra Yukon river Alaska Beringia Yukon |
op_source |
Reyes , A V , Jensen , B J L , Zazula , G D , Ager , T A , Kuzmina , S , La Farge , C & Froese , D G 2010 , ' A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska ' , Quaternary Science Reviews , vol. 29 , no. 5-6 , pp. 801-811 . https://doi.org/10.1016/j.quascirev.2009.12.003 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.12.003 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
5-6 |
container_start_page |
801 |
op_container_end_page |
811 |
_version_ |
1766160466278612992 |