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dc.contributor.authorCarracedo, J. C.
dc.contributor.authorHeller, F.
dc.contributor.authorSoler, Vicente
dc.description.abstractDuring the catastrophic 13 November 1985 eruption of the Nevado del Ruiz volcano (Colombia), that caused the death of 25000 people and damages assessed at US$ 300 million, several types of pyroclastics were emitted including incandescent fragments of andesitic pumice. Oriented samples collected by one of the authors (J.C.C.) from pumice fragments embedded in the ground due to the force of impact contradict one of the fundamental principles of palaeomagnetism that states that the direction of natural remanent magnetization (NRM) is acquired paralel to the applied field. Indeed, these pumice samples carry a stable NRM, but antiparallel to the present geomagnetic field. This fact has been shown to be due to a phenomenon of self-reversal that controls the process of NRM acquisition and is recorded for the first time on this occasion and reproduced in thermal experiments in the laboratoryes_ES
dc.publisherSociedad Geológica de Españaes_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherNevado del Ruizes_ES
dc.titleEvidencia de un fenómeno de autoinversión de la NMR en piroclastos de la erupción de 1985 del volcán Nevado del Ruiz (Colombia)es_ES

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Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España

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