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dc.contributor.author
Trombotto, Dario Tomas
dc.date.available
2018-04-05T17:06:47Z
dc.date.issued
2002-12
dc.identifier.citation
Trombotto, Dario Tomas; Inventory of fossil cryogenic forms and structures in Patagonia and the mountains of Argentina beyond the Andes; Academy of Science for South Africa; South African Journal of Science; 98; 3-4; 12-2002; 171-180
dc.identifier.issn
0038-2353
dc.identifier.uri
http://hdl.handle.net/11336/40889
dc.description.abstract
This article summarizes the most important observations of fossil cryogenic forms and structures in Patagonia and the mountains of Argentina beyond the Andes. The chronological history of cold episodes was based mainly on the dating of two important glaciations: the Great Quaternary Glaciation of 1.2 Myr ago, which represented a maximum of permanently frozen ground, and the expansion of permafrost during the last glaciation of 18–20 kyr ago. Special emphasis is given to those cryogenic indicators that irrefutably mark the occurrence of permafrost. In the earlier glaciation, the maximum expansion, which supposedly outreached the Río Colorado, left epigenetic ice wedge casts in North Patagonia, which penetrated soil profiles to a depth of over 3 m and express differences of up to 16°C from the present mean annual air temperature (MAAT). In the most recent glaciation, temperatures differed from MAAT by at least 14°C. The associated pseudomorphs are smaller in size than for the Great Quaternary Glaciation and so far have been found only in South Patagonia. They not only indicate a tundra environment near the glacial limits identified by Caldenius,1 as in the area of the Río Deseado, for example, but are even to be found at the coast at the present day.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Academy of Science for South Africa
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Criogenic Forms
dc.subject
Patagonia
dc.subject
Argentina
dc.subject.classification
Meteorología y Ciencias Atmosféricas
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Inventory of fossil cryogenic forms and structures in Patagonia and the mountains of Argentina beyond the Andes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-16T15:29:04Z
dc.identifier.eissn
1996-7489
dc.journal.volume
98
dc.journal.number
3-4
dc.journal.pagination
171-180
dc.journal.pais
Sudáfrica
dc.journal.ciudad
Pietermaritzburg
dc.description.fil
Fil: Trombotto, Dario Tomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.journal.title
South African Journal of Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.co.za/content/sajsci/98/3-4/EJC97454
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://hdl.handle.net/10520/EJC97454


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