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Evidence for a small meteorite impact in Extremadura (Spain): the «El Gaseo volcano» (Las Hurdes)

dc.contributor.authorDíaz Martínez, Enrique
dc.contributor.authorSanz Rubio, E.
dc.contributor.authorFernández, C.
dc.contributor.authorMartínez Frías, J.
dc.date.accessioned2014-12-16T10:10:52Z
dc.date.available2014-12-16T10:10:52Z
dc.date.issued2001
dc.identifier.urihttp://hdl.handle.net/10272/9540
dc.description.abstractA small outcrop of pumice-like rocks in northern Ciceres province (Extremadura, Spain) is totally unrelated > to Cenozoic volcanism in the whole Iberian Peninsula. Microscope petrography, SEM-EDX, and XRD studies reveal a highly-vesiculated glass with abundant quartz, and minor amounts of orthcpyroxene and ringwoodite, a high-pressure polymorph of olivine. According to this evidence, we interpret this rock as a result of a hypervelocity impact of a small meteorite. Under this preliminary interpretation, glass and vesicles resulted from melting and vaporization of the target metasedimentary clastic rocks and pore water, quartz grains are unmelted relics of quartz from the target rock, and ringwoodite originated from a Mg-bearing mineral phase during and immediately after shock-wave passage. The reduced size and geological uniqueness of the outcrop merits its highest protection as part of the geological heritage of meteorite impacts in Spain, and any extraction of material from the site should be restricted and strictly controlleden_US
dc.language.isospaen_US
dc.publisherSociedad Geológica de Españaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.otherMeteoriteen_US
dc.subject.otherImpacten_US
dc.subject.otherMelten_US
dc.subject.otherPumiceen_US
dc.subject.otherRingwooditeen_US
dc.subject.otherExtremaduraen_US
dc.subject.otherSpainen_US
dc.titleEvidencia de un pequeño impacto meteorítico en Extremadura: El «volcán» de El Gaseo (Las Hurdes)en_US
dc.titleEvidence for a small meteorite impact in Extremadura (Spain): the «El Gaseo volcano» (Las Hurdes)eng
dc.typeinfo:eu-repo/semantics/articleen_US
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen_US


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