The flow-banded rhyolite dome of San Bartolome (Alcoroches, Guadalajara), a novelty for Spain

  • Kees Linthout Institute of Earth Sciences, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
  • Arnout Jan Everts Institute of Earth Sciences, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
Keywords: Keltiberian, Permian, polymict, pyroclastic breccia

Abstract

In the Keltiberian Massif of Nevera (SE Guadalajara, Spain) a Permian endogenous dome of flow-banded felsophyric rhyolite is recognized. Polymict, poorly-sorted, matrix-supported pyroclastica along the vent of the body indicate a gas-rich blow-out prior to its emplacement. The breccias comprise, besides fragments of paleozoic sedimentary country-rock, porphyritic phenodacite and phenoandesite, indicating the existence of less differentiated calc-alkaline subvolcanic rock in the underground.

Published
1992-01-01
How to Cite
Kees Linthout, & Arnout Jan Everts. (1992). The flow-banded rhyolite dome of San Bartolome (Alcoroches, Guadalajara), a novelty for Spain. Netherlands Journal of Geosciences, 71, 33-37. Retrieved from https://njgjournal.nl/index.php/njg/article/view/12527
Issue
Volume 71 - 1992
Section
Regular paper

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