The epiclastic barrier-island system of the Early‒Middle Jurassic in eastern Spain

The epiclastic barrier-island system of the Early‒Middle Jurassic in eastern Spain Background During the Early-Middle Jurassic, several mainly volcaniclastic submarine eruptions, which followed well marked lineaments, took place in the Iberian Ranges of eastern Spain. Some of these volcanoes were occasionally emerged during sea-level lowstand periods. Purposes In this work we aim to present the signs indicating that a huge volcanic pile, located in the Sierra de Javalambre (Teruel, Spain), could have been subjected to emersion, reworking and colonization by flora. We also intend to date the volcanism and to delimit the most likely period of time when emersion, reworking and colonization were produced. Methods The research work was supported by geological mapping, as well as by preparing stratigraphic sections and their palaeontological sampling. Biostratigraphical dating was achieved though taxonimical determination of ammonites, bra- chiopods, and data from pre-existing palynological studies. Results As a result of the shallow marine and subaerial partial erosion of the volcanic edifice, epiclastic bodies, some of which show large scale cross-bedding and bar geometry, were generated. These bedforms are interpreted as sandwaves constituting a barrier-island system protecting a lagoon on which low-energy sediments, rich in plant remains, together with washover fan facies were deposited. Conclusions An Early Toarcian, Serpentinum Chronozone age for the volcanism is http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Iberian Geology Springer Journals

The epiclastic barrier-island system of the Early‒Middle Jurassic in eastern Spain

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Publisher
Springer International Publishing
Copyright
Copyright © 2018 by Springer International Publishing AG, part of Springer Nature
Subject
Earth Sciences; Earth Sciences, general; Geology; Structural Geology
ISSN
1698-6180
eISSN
1886-7995
D.O.I.
10.1007/s41513-018-0061-7
Publisher site
See Article on Publisher Site

Abstract

Background During the Early-Middle Jurassic, several mainly volcaniclastic submarine eruptions, which followed well marked lineaments, took place in the Iberian Ranges of eastern Spain. Some of these volcanoes were occasionally emerged during sea-level lowstand periods. Purposes In this work we aim to present the signs indicating that a huge volcanic pile, located in the Sierra de Javalambre (Teruel, Spain), could have been subjected to emersion, reworking and colonization by flora. We also intend to date the volcanism and to delimit the most likely period of time when emersion, reworking and colonization were produced. Methods The research work was supported by geological mapping, as well as by preparing stratigraphic sections and their palaeontological sampling. Biostratigraphical dating was achieved though taxonimical determination of ammonites, bra- chiopods, and data from pre-existing palynological studies. Results As a result of the shallow marine and subaerial partial erosion of the volcanic edifice, epiclastic bodies, some of which show large scale cross-bedding and bar geometry, were generated. These bedforms are interpreted as sandwaves constituting a barrier-island system protecting a lagoon on which low-energy sediments, rich in plant remains, together with washover fan facies were deposited. Conclusions An Early Toarcian, Serpentinum Chronozone age for the volcanism is

Journal

Journal of Iberian GeologySpringer Journals

Published: Apr 16, 2018

References

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