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Authordc.contributor.authorRoperch, Pierrick 
Authordc.contributor.authorGattacceca, Jerome 
Authordc.contributor.authorValenzuela, Millarca 
Authordc.contributor.authorDevouard, Bertrand 
Authordc.contributor.authorLorand, Jean Pierre 
Authordc.contributor.authorArriagada Ortega, César 
Authordc.contributor.authorRochette, Pierre 
Authordc.contributor.authorLatorre, Claudio 
Authordc.contributor.authorBeck, Pierre 
Admission datedc.date.accessioned2018-03-26T18:29:57Z
Available datedc.date.available2018-03-26T18:29:57Z
Publication datedc.date.issued2017-07-01
Cita de ítemdc.identifier.citationEarth and Planetary Science Letters 469 (2017) 15–26es_ES
Identifierdc.identifier.other10.1016/j.epsl.2017.04.009
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/147003
Abstractdc.description.abstractWe describe extended occurrences of unusual silicate glass surface layers from the Atacama Desert (Chile). These glasses, found near the town of Pica at four localities separated by up to 70 km, are neither fulgurites, nor volcanic glasses, nor metallurgical slags related to anthropic activity, but show close similarities to other glasses that have been previously attributed to large airbursts created by meteoroids entering the Earth's atmosphere. The glasses are restricted to specific Late Pleistocene terrains: paleo-wetlands and soils rich in organic matter with SiO2-rich plant remains, salts and carbonates. C-14 dating and paleomagnetic data indicate that the glasses were formed during at least two distinct periods. This rules out the hypothesis of a single large airburst as the cause of surface melting. Instead, burning of organic-rich soils in dried-out grassy wetlands during climate oscillations between wet and dry periods can account for the formation of the Pica glasses. Large oases did indeed form in the hyperarid Atacama Desert due to elevated groundwater tables and increased surface discharge during the Central Andean Pluvial Event (roughly coeval with the Mystery interval and Younger Dryas). Finally, we discuss the implications of our results for the other surface glasses previously attributed to extraterrestrial events.es_ES
Patrocinadordc.description.sponsorshipProgramme National de Planetologie (INSU/CNES) Artemis projects (INSU,CNRS) OSU Rennes Fondecyt 3140562 IEB PFB-23es_ES
Lenguagedc.language.isoenes_ES
Publisherdc.publisherElsevieres_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
Sourcedc.sourceEarth and Planetary Science Letterses_ES
Keywordsdc.subjectSilicate glasses_ES
Keywordsdc.subjectAirburstes_ES
Keywordsdc.subjectWetlandes_ES
Keywordsdc.subjectPyrometamorphismes_ES
Keywordsdc.subjectYounger Dryases_ES
Keywordsdc.subjectAtacama Desertes_ES
Títulodc.titleSurface vitrification caused by natural fires in Late Pleistocene wetlands of the Atacama Desertes_ES
Document typedc.typeArtículo de revista
Catalogueruchile.catalogadorpgves_ES
Indexationuchile.indexArtículo de publicación ISIes_ES


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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile