Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada
Abstract: Cross-bedding, the inclined internal stratification that records the migration of certain transverse sedimentary bedforms, is nearly ubiquitous in current-transported bedload sediments. Although examples of the structure are known from inorganic clastic sediments and sedimentary rocks from...
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:2993 2023-05-15T14:26:23+02:00 Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada Davies, Neil S. Gosse, John C. Rybczynski, Natalia 2014-02 text http://eprints.esc.cam.ac.uk/2993/ http://eprints.esc.cam.ac.uk/2993/1/19.full.pdf http://jsedres.geoscienceworld.org/content/84/1/19 https://doi.org/10.2110/jsr.2014.5 en eng http://eprints.esc.cam.ac.uk/2993/1/19.full.pdf Davies, Neil S. and Gosse, John C. and Rybczynski, Natalia (2014) Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada. Journal of Sedimentary Research, 84 (1). pp. 19-25. ISSN 1527-1404 DOI https://doi.org/10.2110/jsr.2014.5 <https://doi.org/10.2110/jsr.2014.5 > 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2014 ftucambridgeesc https://doi.org/10.2110/jsr.2014.5 2020-08-27T18:09:30Z Abstract: Cross-bedding, the inclined internal stratification that records the migration of certain transverse sedimentary bedforms, is nearly ubiquitous in current-transported bedload sediments. Although examples of the structure are known from inorganic clastic sediments and sedimentary rocks from practically all depositional environments and intervals of geologic history, here we report cross-bedded lenses that are composed wholly or significantly of woody debris, in Pliocene alluvium of the Beaufort Formation in the Canadian High Arctic. The uniqueness of cross-bedded woody debris has hitherto been overlooked, but we demonstrate that, in the entire Phanerozoic record, it is apparently restricted to alluvium deposited during a warm climatic interval that permitted the growth of boreal-type forests within 10° latitude of the North Pole. The marked spatiotemporal restriction of cross-bedded woody debris implies that there may be environmental factors, unique to polar forests, which promote the subaqueous transport of large amounts of fine woody debris as fluvial bedload. We propose a non-uniformitarian conceptual model for the formation of cross-bedded woody debris in forested polar rivers whereby an exceptional abundance of woody debris could accumulate, and become saturated and denser than water, due to reduced decomposition on forest floors that were subject to prolonged periods of darkness and subzero temperatures. Article in Journal/Newspaper Arctic Arctic Climate change North Pole University of Cambridge, Department of Earth Sciences: ESC Publications Arctic Canada Meighen Island ENVELOPE(-99.503,-99.503,79.919,79.919) North Pole Journal of Sedimentary Research 84 1 19 25 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Davies, Neil S. Gosse, John C. Rybczynski, Natalia Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
Abstract: Cross-bedding, the inclined internal stratification that records the migration of certain transverse sedimentary bedforms, is nearly ubiquitous in current-transported bedload sediments. Although examples of the structure are known from inorganic clastic sediments and sedimentary rocks from practically all depositional environments and intervals of geologic history, here we report cross-bedded lenses that are composed wholly or significantly of woody debris, in Pliocene alluvium of the Beaufort Formation in the Canadian High Arctic. The uniqueness of cross-bedded woody debris has hitherto been overlooked, but we demonstrate that, in the entire Phanerozoic record, it is apparently restricted to alluvium deposited during a warm climatic interval that permitted the growth of boreal-type forests within 10° latitude of the North Pole. The marked spatiotemporal restriction of cross-bedded woody debris implies that there may be environmental factors, unique to polar forests, which promote the subaqueous transport of large amounts of fine woody debris as fluvial bedload. We propose a non-uniformitarian conceptual model for the formation of cross-bedded woody debris in forested polar rivers whereby an exceptional abundance of woody debris could accumulate, and become saturated and denser than water, due to reduced decomposition on forest floors that were subject to prolonged periods of darkness and subzero temperatures. |
format |
Article in Journal/Newspaper |
author |
Davies, Neil S. Gosse, John C. Rybczynski, Natalia |
author_facet |
Davies, Neil S. Gosse, John C. Rybczynski, Natalia |
author_sort |
Davies, Neil S. |
title |
Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada |
title_short |
Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada |
title_full |
Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada |
title_fullStr |
Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada |
title_full_unstemmed |
Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada |
title_sort |
cross-bedded woody debris from a pliocene forested river system in the high arctic: beaufort formation, meighen island, canada |
publishDate |
2014 |
url |
http://eprints.esc.cam.ac.uk/2993/ http://eprints.esc.cam.ac.uk/2993/1/19.full.pdf http://jsedres.geoscienceworld.org/content/84/1/19 https://doi.org/10.2110/jsr.2014.5 |
long_lat |
ENVELOPE(-99.503,-99.503,79.919,79.919) |
geographic |
Arctic Canada Meighen Island North Pole |
geographic_facet |
Arctic Canada Meighen Island North Pole |
genre |
Arctic Arctic Climate change North Pole |
genre_facet |
Arctic Arctic Climate change North Pole |
op_relation |
http://eprints.esc.cam.ac.uk/2993/1/19.full.pdf Davies, Neil S. and Gosse, John C. and Rybczynski, Natalia (2014) Cross-Bedded Woody Debris From A Pliocene Forested River System In the High Arctic: Beaufort Formation, Meighen Island, Canada. Journal of Sedimentary Research, 84 (1). pp. 19-25. ISSN 1527-1404 DOI https://doi.org/10.2110/jsr.2014.5 <https://doi.org/10.2110/jsr.2014.5 > |
op_doi |
https://doi.org/10.2110/jsr.2014.5 |
container_title |
Journal of Sedimentary Research |
container_volume |
84 |
container_issue |
1 |
container_start_page |
19 |
op_container_end_page |
25 |
_version_ |
1766298925632847872 |