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(Article of periodic en Anglais - 2008)

Document title

Seafloor evidence for ice shelf flow across the Alaska-Beaufort margin of the Arctic Ocean

Authors(s) and Affiliation(s)

ENGELS J.L. (1) ; EDWARDS M.H. (2) ; POLYAK L. (3) ; JOHNSON P.D. (4) ;
(1) University of Hawaii, Dept. of Geology, Honolulu, Hawaii, ETATS-UNIS
(2) University of Hawaii, Inst. of Geophysics and Planetology, Honolulu, ETATS-UNIS
(3) Ohio State University, Columbus, ETATS-UNIS
(4) University of Hawaii, Hawaii Mapping Research Group, Honolulu, ETATS-UNIS

Abstract

New imagery of seeafloor along a 640 km stretch of the Alaska and Beaufort margins (ABM) in water depths from 250 to 2800 m depicts a repetitive asociation of glaciogenic bedforms (lineations and iceberg scours), broad erosional bathymetric features and adjacent downslope turbidite gullies. The glacial geology of surrounding areas suggests that an ice shelf probably flowed from the mouths of overdeepened glacial throughs in the Canadian Arctic Archipelago westward along the ABM and across the Chukchi Borderland. This curved pathway indicates an obstruction to ice flow in the central Canada Basin. Evidence for glaciogenic features on the ABM corrobates suggestions that large ice volumes and extents existed in the Arctic during Pleistocene glacial periods. These findings have far-reaching implications for Arctic climate studies, ocean circulation, sediment stratigraphy and the stability of circum-Arctic continental ice masses

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2008, vol. 33, no7 [pp. 1047-1063]

Bibliographic references : 2 p.

Collation : 10 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1601

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2008
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