Results 201 to 210 of about 19,515,932 (251)

Isotopic identification of subglacial processes

1986
A comprehensive stable isotope study of basal ice and debris layers in two Yukon surging glaciers suggests an isotopically variable basal freezing cycle. Trapridge and Backe Glaciers, St. Elias Range, Yukon, Canada, have parallel basal debris layers that extend for hundreds of metres along marginal ice faces and in meltwater tunnels.
Michael Maxwell
openaire   +2 more sources

Characteristics of the subglacially-formed debris-rich chemical deposits and related subglacial processes of Qiangyong Glacier, Tibet

Journal of Geographical Sciences, 2003
Subglacially-formed debris-rich chemical deposits were found both on bedrock surface and in bedrock crevice on the edge of Qiangyong Glacier, one of the continental glaciers in Tibet. Grain size distribution, internal structures and chemical components of the chemical deposits were analyzed.
Luo Risheng, Cao Jun, Liu Gengnian, Cui Zhijiu   +3 more
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Particle and aggregate mobility in till: Microscopic evidence of subglacial processes

Quaternary Science Reviews, 1997
Abstract Microscopic studies of tills show that the deforming bed of glaciers is made up of minute rotational elements or wheels, consisting of a nucleus alone or a nucleus with spiralling arms of fine grains. These fine grains can move from one wheel to the next, providing a process of high grain mobility within a deforming subglacial till ...
J. Meer
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Subglacial Processes and Sediments

2018
J. Menzies, Jaap J.M. van der Meer, W.W. Shilts   +2 more
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Subglacial Processes

2011
info:eu-repo/semantics ...
Fitzsimons, Sean, Lorrain, Reginald
openaire   +1 more source

Subglacial processes and drumlin formation in a confined bedrock valley, northwest Ireland

Boreas, 2010
J. Knight
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Inverse modelling of subglacial hydraulic processes

2023
Numerous studies have documented that water at the ice-bed interface can affect the ice flow dynamics of both mountain glaciers and ice sheets. Water at the bed is routed through a complex network of conduits that form a subglacial drainage system, which evolves over the melt season in response to the changes in the meltwater supply.
openaire   +1 more source

Investigating Antarctic subglacial hydrologic processes from marine sediment cores

2023
Understanding processes operating beneath glacial ice is imperative for holistic knowledge of glaciated regions and for accurately projecting future behavior of and sea-level contributions from the Antarctic Ice Sheet. Evolution of subglacial hydrologic networks is one such process where knowledge gaps persist, in large part because of the challenges ...
openaire   +1 more source

Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes

Nature, 2001
Over 70 lakes have now been identified beneath the Antarctic ice sheet. Although water from none of the lakes has been sampled directly, analysis of lake ice frozen (accreted) to the underside of the ice sheet above Lake Vostok, the largest of these lakes, has allowed inferences to be made on lake water chemistry and has revealed small quantities of ...
Siegert, MJ, Ellis-Evans, JC, Tranter, M, Mayer, C, Petit, J-R, Salamatin, A, Priscu, JC   +6 more
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Processes and environmental significance of the subglacial chemical deposits in Tianshan Mountains

Science in China Series D: Earth Sciences, 2005
On the bedrock surface of Glacier No.1 in the headwater of Urumqi River, Tianshan Mts., well layered and crystallized subglacial calcite precipitations were discovered. Based on observations and analysis of the surface form, sedimentary texture and structure, and chemical composition of the deposits, clues about the subglacial processes and environment
Gengnian Liu, Risheng Luo, Jun Cao, Zhijiu Cui   +3 more
openaire   +1 more source