Sedimentological, geomorphological and dynamic context of debris-mantled glaciers, Mount Everest (Sagarmatha) region, Nepal

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dc.contributor.author Hambrey, Michael J.
dc.contributor.author Quincey, Duncan J.
dc.contributor.author Glasser, Neil F.
dc.contributor.author Reynolds, John M.
dc.contributor.author Richardson, Shaun J.
dc.contributor.author Clemmens, Samuel
dc.date.accessioned 2010-12-15T10:52:17Z
dc.date.available 2010-12-15T10:52:17Z
dc.date.issued 2009-06
dc.identifier.citation Hambrey , M J , Quincey , D J , Glasser , N F , Reynolds , J M , Richardson , S J & Clemmens , S 2009 , ' Sedimentological, geomorphological and dynamic context of debris-mantled glaciers, Mount Everest (Sagarmatha) region, Nepal ' Quaternary Science Reviews , vol 27 , no. 25-26 , pp. 1084-1084 . , 10.1016/j.quascirev.2009.04.009 en
dc.identifier.issn 0277-3791
dc.identifier.other PURE: 155516
dc.identifier.other dspace: 2160/6004
dc.identifier.uri http://hdl.handle.net/2160/6004
dc.description Hambrey, M. J., Quincey, D. J., Glasser, N. F., Reynolds, J. M., Richardson, S. J., Clemmens, S. (2009). Sedimentological, geomorphological and dynamic context of debris-mantled glaciers, Mount Everest (Sagarmatha) region, Nepal. Quaternary Science Reviews, 28 (11/12), 1084-1084. en
dc.description.abstract This paper presents the sediment, landform and dynamic context of four avalanche-fed valley glaciers (Khumbu, Imja, Lhotse and Chukhung) in the Mount Everest (Sagarmatha) region of Nepal. All four glaciers have a mantle of debris dominated by sandy boulder-gravel that suppresses melting to an increasing degree towards the snout, leading to a progressive reduction in the overall slope of their longitudinal profile. Prominent lateral–terminal moraine complexes, also comprising sandy bouldergravel, enclose the glaciers. These terminal moraines originally grew by accretion of multiple sedimentary facies of basal glacial and supraglacial origin, probably by folding and thrusting when the glaciers were more dynamic during the Little Ice Age. The four glaciers are in various stages of recession, and demonstrate a range of scenarios from down-wasting of the glacier tongue, through morainedammed lake development, to post-moraine-dam breaching. Khumbu Glacier is at the earliest stage of supraglacial pond formation and shows no sign yet of developing a major lake, although one is likely to develop behind its >250 m high composite terminal moraine. Imja Glacier terminates in a substantial body of water behind a partially ice-cored moraine dam (as determined from geophysical surveys), but morphologically appears unlikely to be an immediate threat. Chukhung Glacier already has a breached moraine and a connected debris fan, and therefore no longer poses a threat. Lhotse Glacier has an inclined, free-draining tongue that precludes hazardous lake development. From the data assembled, a conceptual model, applicable to other Himalayan glaciers, is proposed to explain the development of large, lateral-terminal moraine complexes and associated potentially hazardous moraine dams. – 2008 Elsevier Ltd. All rights reserved en
dc.format.extent 1 en
dc.language.iso eng
dc.relation.ispartof Quaternary Science Reviews en
dc.title Sedimentological, geomorphological and dynamic context of debris-mantled glaciers, Mount Everest (Sagarmatha) region, Nepal en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.quascirev.2009.04.009
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Centre for Glaciology en
dc.description.status Peer reviewed en


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