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dc.contributor.author
Milana, Juan Pablo
dc.date.available
2017-01-27T19:47:23Z
dc.date.issued
2015-09
dc.identifier.citation
Milana, Juan Pablo; Molards and Their Relation to Landslides Involving Permafrost Failure; Wiley; Permafrost And Periglacial Processes; 27; 3; 9-2015; 271-284
dc.identifier.issn
1045-6740
dc.identifier.uri
http://hdl.handle.net/11336/12086
dc.description.abstract
Molards are conical shaped, often-symmetrical, debris mounds with a distinctive radial grain-size gradation, which were first-named in the Alps over 100 years ago. Historically these features did not receive much academic attention as they were rarely observed. Today, six different interpretations can be applied to molards, and the most recent has suggested a link to permafrost failure. The aim of this research was to test the hypothesis that molards result from the failure of permafrost-bearing ground and subsequent melting of the frozen debris boulders. This hypothesis is tested here by: 1) reviewing the known global distribution of molard-bearing mass movements with respect to permafrost distribution; 2) investigating a landslide in the Andes of Argentina with unequivocal relation to permafrost failure, 3) the survey and interpretation of the external and internal structure of molards, applying sedimentary transport concepts and 4) reproducing molards by laboratory simulation. Results show that, with few exceptions, molards are produced from the melt-out from the ice of permafrost blocks. In particular, a permafrost source of the mass flow is more certain for molard densely populated landslide deposits. This study serves to reappraise the presence of molards as they could be used to track permafrost degradation on mountainous areas and hence climate changes (temperature or precipitation).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Permafrost
dc.subject
Climate Change
dc.subject
Landslides
dc.subject
Molards
dc.subject.classification
Geociencias multidisciplinaria
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Molards and Their Relation to Landslides Involving Permafrost Failure
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-12-06T16:33:33Z
dc.journal.volume
27
dc.journal.number
3
dc.journal.pagination
271-284
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Milana, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Fisicas y Naturales; Argentina
dc.journal.title
Permafrost And Periglacial Processes
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/ppp.1878/full
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1002/ppp.1878


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