Show simple item record

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.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.publisherSociedad Geológica de Españaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
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

Files in this item

This item appears in the following Collection(s)

Show simple item record

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

Copyright © 2008-2010. ARIAS MONTANO. Repositorio Institucional de la Universidad de Huelva
Contact Us | Send Feedback |