RT Journal Article
T1 Evidencia de un pequeño impacto meteorítico en Extremadura: El «volcán» de El Gaseo (Las Hurdes)
T1 Evidence for a small meteorite impact in Extremadura (Spain): the «El Gaseo volcano» (Las Hurdes)
A1 Díaz Martínez, Enrique
A1 Sanz Rubio, E.
A1 Fernández, C.
A1 Martínez Frías, J.
AB A 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 studiesreveal a highly-vesiculated glass with abundant quartz, and minor amounts of orthcpyroxene andringwoodite, a high-pressure polymorph of olivine. According to this evidence, we interpret this rock as aresult of a hypervelocity impact of a small meteorite. Under this preliminary interpretation, glass andvesicles resulted from melting and vaporization of the target metasedimentary clastic rocks and porewater, quartz grains are unmelted relics of quartz from the target rock, and ringwoodite originated from aMg-bearing mineral phase during and immediately after shock-wave passage. The reduced size andgeological uniqueness of the outcrop merits its highest protection as part of the geological heritage ofmeteorite impacts in Spain, and any extraction of material from the site should be restricted and strictly controlled
PB Sociedad Geológica de España
YR 2001
FD 2001
LK http://hdl.handle.net/10272/9540
UL http://hdl.handle.net/10272/9540
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 15 jun 2026