TY - JOUR
T1 - Glacial advance and stagnation caused by rock avalanches
AU - Vacco, David A.
AU - Alley, Richard B.
AU - Pollard, David
N1 - Funding Information:
We thank Patrick Applegate, Rudy Slingerland, and Sridhar Anandakrishnan for helpful discussions. This work was funded in part by NSF Grants 0424589 and 053121 , and by the Gary Comer Science and Education Foundation .
PY - 2010/5
Y1 - 2010/5
N2 - New model results show that a glacier advance caused by deposition of a rock avalanche on the ice will be followed by stagnation of the advanced ice lobe, producing distributed, hummocky deposits quite different from the single moraine ridges typically dated in paleoclimatic reconstructions. We obtain these results using a numerical flow-line glacier model with superimposed rock debris. In particular, our results imply that the single moraine ridge known as the Waiho Loop of the Franz Josef Glacier, New Zealand, is not the result of an advance triggered by a rock avalanche, else there would be a widespread, hummocky, glacial stagnation deposit associated with it.
AB - New model results show that a glacier advance caused by deposition of a rock avalanche on the ice will be followed by stagnation of the advanced ice lobe, producing distributed, hummocky deposits quite different from the single moraine ridges typically dated in paleoclimatic reconstructions. We obtain these results using a numerical flow-line glacier model with superimposed rock debris. In particular, our results imply that the single moraine ridge known as the Waiho Loop of the Franz Josef Glacier, New Zealand, is not the result of an advance triggered by a rock avalanche, else there would be a widespread, hummocky, glacial stagnation deposit associated with it.
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U2 - 10.1016/j.epsl.2010.03.019
DO - 10.1016/j.epsl.2010.03.019
M3 - Article
AN - SCOPUS:77952291859
SN - 0012-821X
VL - 294
SP - 123
EP - 130
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
IS - 1-2
ER -