Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia
Northern Yukon cliff-top eolian deposits are indicators of past climates and environments. The deposits are located along the Ramparts of the Porcupine River, near the international boundary. These eolian deposits resulted from southwest wind regimes that operated at about 14,860BP, and more certain...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.542.6123 2023-05-15T18:03:07+02:00 Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia Bernard Lauriola Yannick Cabanaa Jacques Cinq-marsb Marie-anne Geurtsa F. Wayne Grimmc The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.6123 http://www.geographie.uottawa.ca/PDF/blauriol/Lauriol_et_al_(2001)_b.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.6123 http://www.geographie.uottawa.ca/PDF/blauriol/Lauriol_et_al_(2001)_b.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geographie.uottawa.ca/PDF/blauriol/Lauriol_et_al_(2001)_b.pdf text ftciteseerx 2016-01-08T11:08:20Z Northern Yukon cliff-top eolian deposits are indicators of past climates and environments. The deposits are located along the Ramparts of the Porcupine River, near the international boundary. These eolian deposits resulted from southwest wind regimes that operated at about 14,860BP, and more certainly at 11,640–8200BP and from 4600BP to present. Palynological analysis indicates that these three periods were marked by different vegetation covers: the earliest one being dominated with Cyperaceae, the intermediate one by Shepherdia canadiensis, and the most recent one by spruce (Picea). Molluscs are particularly numerous and diversified, which suggests that the cliff-top deposits were important refuges for these animals. Molluscan assemblages indicate that the climate was wetter at about 14,860BP than between 11,640BP and 8200BP. The xeric regime that marked the latter period is also indicated by gypsum concretions. It is suggested that the molluscs could have been introduced by migratory birds that, in turn, would also have been able to use the snail shells from the eolian deposits as an important dietary element. It is also suggested that the Text Porcupine River Beringia Yukon Unknown Yukon The Ramparts ENVELOPE(-128.871,-128.871,66.217,66.217) Ramparts of the Porcupine ENVELOPE(-140.714,-140.714,67.445,67.445) |
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Open Polar |
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Unknown |
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ftciteseerx |
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English |
description |
Northern Yukon cliff-top eolian deposits are indicators of past climates and environments. The deposits are located along the Ramparts of the Porcupine River, near the international boundary. These eolian deposits resulted from southwest wind regimes that operated at about 14,860BP, and more certainly at 11,640–8200BP and from 4600BP to present. Palynological analysis indicates that these three periods were marked by different vegetation covers: the earliest one being dominated with Cyperaceae, the intermediate one by Shepherdia canadiensis, and the most recent one by spruce (Picea). Molluscs are particularly numerous and diversified, which suggests that the cliff-top deposits were important refuges for these animals. Molluscan assemblages indicate that the climate was wetter at about 14,860BP than between 11,640BP and 8200BP. The xeric regime that marked the latter period is also indicated by gypsum concretions. It is suggested that the molluscs could have been introduced by migratory birds that, in turn, would also have been able to use the snail shells from the eolian deposits as an important dietary element. It is also suggested that the |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Bernard Lauriola Yannick Cabanaa Jacques Cinq-marsb Marie-anne Geurtsa F. Wayne Grimmc |
spellingShingle |
Bernard Lauriola Yannick Cabanaa Jacques Cinq-marsb Marie-anne Geurtsa F. Wayne Grimmc Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia |
author_facet |
Bernard Lauriola Yannick Cabanaa Jacques Cinq-marsb Marie-anne Geurtsa F. Wayne Grimmc |
author_sort |
Bernard Lauriola |
title |
Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia |
title_short |
Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia |
title_full |
Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia |
title_fullStr |
Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia |
title_full_unstemmed |
Cliff-top eolian deposits and associated molluscan assemblages as indicators of Late Pleistocene and Holocene environments in Beringia |
title_sort |
cliff-top eolian deposits and associated molluscan assemblages as indicators of late pleistocene and holocene environments in beringia |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.6123 http://www.geographie.uottawa.ca/PDF/blauriol/Lauriol_et_al_(2001)_b.pdf |
long_lat |
ENVELOPE(-128.871,-128.871,66.217,66.217) ENVELOPE(-140.714,-140.714,67.445,67.445) |
geographic |
Yukon The Ramparts Ramparts of the Porcupine |
geographic_facet |
Yukon The Ramparts Ramparts of the Porcupine |
genre |
Porcupine River Beringia Yukon |
genre_facet |
Porcupine River Beringia Yukon |
op_source |
http://www.geographie.uottawa.ca/PDF/blauriol/Lauriol_et_al_(2001)_b.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.6123 http://www.geographie.uottawa.ca/PDF/blauriol/Lauriol_et_al_(2001)_b.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766173824412286976 |