Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads
Some recent examples of transient Earth loads (Lake Bonneville, Utah; Glacier Bay, Alaska; northeast Greenland) indicate that both the viscosity and finite strength of the mantle are lower than is commonly presumed. A time constant (1/ e ) of 4000 years is estimated for Lake Bonneville, and of 1000...
Published in: | Geophysical Journal of the Royal Astronomical Society |
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fthighwire:oai:open-archive.highwire.org:gji:14/1-4/261 2023-05-15T16:20:37+02:00 Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads Crittenden, Max D. 1967-11-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/14/1-4/261 https://doi.org/10.1111/j.1365-246X.1967.tb06243.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/14/1-4/261 http://dx.doi.org/10.1111/j.1365-246X.1967.tb06243.x Copyright (C) 1967, Oxford University Press Articles TEXT 1967 fthighwire https://doi.org/10.1111/j.1365-246X.1967.tb06243.x 2013-05-28T06:44:25Z Some recent examples of transient Earth loads (Lake Bonneville, Utah; Glacier Bay, Alaska; northeast Greenland) indicate that both the viscosity and finite strength of the mantle are lower than is commonly presumed. A time constant (1/ e ) of 4000 years is estimated for Lake Bonneville, and of 1000 years for northeast Greenland. A strain rate of 10−14 is typical. These figures imply viscosities in a homogeneous half space ranging from 1020 to 1021 poises. An upper limit of finite strength is set by Lake Bonneville at a few times 106 dyn/cm2. If mountain ranges like the Sierra Nevada or Himalaya are regarded as dynamically supported rather than static systems, this low value is not incompatible with other geologic observations. Text glacier glacier Greenland Alaska HighWire Press (Stanford University) Glacier Bay Greenland Geophysical Journal of the Royal Astronomical Society 14 1-4 261 279 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Crittenden, Max D. Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads |
topic_facet |
Articles |
description |
Some recent examples of transient Earth loads (Lake Bonneville, Utah; Glacier Bay, Alaska; northeast Greenland) indicate that both the viscosity and finite strength of the mantle are lower than is commonly presumed. A time constant (1/ e ) of 4000 years is estimated for Lake Bonneville, and of 1000 years for northeast Greenland. A strain rate of 10−14 is typical. These figures imply viscosities in a homogeneous half space ranging from 1020 to 1021 poises. An upper limit of finite strength is set by Lake Bonneville at a few times 106 dyn/cm2. If mountain ranges like the Sierra Nevada or Himalaya are regarded as dynamically supported rather than static systems, this low value is not incompatible with other geologic observations. |
format |
Text |
author |
Crittenden, Max D. |
author_facet |
Crittenden, Max D. |
author_sort |
Crittenden, Max D. |
title |
Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads |
title_short |
Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads |
title_full |
Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads |
title_fullStr |
Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads |
title_full_unstemmed |
Viscosity and Finite Strength of the Mantle as Determined from Water and Ice Loads |
title_sort |
viscosity and finite strength of the mantle as determined from water and ice loads |
publisher |
Oxford University Press |
publishDate |
1967 |
url |
http://gji.oxfordjournals.org/cgi/content/short/14/1-4/261 https://doi.org/10.1111/j.1365-246X.1967.tb06243.x |
geographic |
Glacier Bay Greenland |
geographic_facet |
Glacier Bay Greenland |
genre |
glacier glacier Greenland Alaska |
genre_facet |
glacier glacier Greenland Alaska |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/14/1-4/261 http://dx.doi.org/10.1111/j.1365-246X.1967.tb06243.x |
op_rights |
Copyright (C) 1967, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.1967.tb06243.x |
container_title |
Geophysical Journal of the Royal Astronomical Society |
container_volume |
14 |
container_issue |
1-4 |
container_start_page |
261 |
op_container_end_page |
279 |
_version_ |
1766008552921497600 |