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Article . 2017
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Fontanarejo (Ciudad Real): una localidad icnológica excepcional del Ordovícico Inferior en los Montes de Toledo meridionales

An outstanding ichnological locality from the Lower Ordovician of the southern Toledo Mounts (Fontanarejo, Ciudad Real province, central Spain)
Authors: Gutiérrez Marco, Juan Carlos; Lorenzo Álvarez, Saturnino; Sá, Arturo A.;

Fontanarejo (Ciudad Real): una localidad icnológica excepcional del Ordovícico Inferior en los Montes de Toledo meridionales

Abstract

[EN] Large bedding exposures, intensively bioturbated by the producer of Daedalus desglandi (Rouault), are reported from the lower part of the Ordovician succession (lower Arenigian “Intermediate Beds”) east of the town of Fontanarejo (Ciudad Real Province). This ichnofossil corresponds to a vertical spreiten burrow, spirally twisted inwards, initiated from a single point in the water-sediment surface on a very shallow marine environment. Most of the recorded specimens are transverse sections of D. desglandi in epirelief preservation, reaching a density of 250-275 specimens per square meter, and extending over an area up to 12000 m2. The magnitude of this extremely crowded monoichnospecific assemblage makes this locality unique in the world’s ichnological record for the Paleozoic and reinforces its future inventory in the list of the Spanish Geosites of international interest. Similar occurrences of D. desglandi in the Naturtejo Geopark of Portugal reached a maximum of 70 m2 (Serra de Muradal) and 700 m2 (Fonte Longa geosite) for epichnial records of a single bed

[ES] Se presenta el hallazgo de un gran afloramiento cuarcítico situado al este de Fontanarejo (Ciudad Real), afectado por una intensa bioturbación a cargo del productor de Daedalus desglandi (Rouault). La localidad se sitúa en los niveles inferiores de las “Capas Intermedias” (Arenigiense inferior) y el icnofósil corresponde a una excavación vertical con conexiones convexas, con desarrollo helicoidal hacia el interior, que se inicia desde un punto situado inicialmente en la interfase agua-sedimento, en un ambiente marino muy somero. La mayoría de los ejemplares observados son secciones transversales de D. desglandi conservados como epirelieves, que alcanzan la increíble densidad de 250-275 ejemplares/m2, en un área que podría alcanzar los 12000 m2. La magnitud de esta asociación icnoespecífica, tan masiva, convierte a la localidad en un referente único a nivel mundial del registro icnológico paleozoico, y promueve nuestra propuesta para que sea inventariada en la lista de los Lugares Geológicos Españoles de interés internacional.

Este trabajo es una contribución a los proyectos IBEROR (CGL2012-39471) del MINECO e IGCP 653 (IUGS-UNESCO).

Peer reviewed

Country
Spain
Keywords

Ordovician, Geological heritage, 2416 Paleontología, Daedalus, Península Ibérica, Paleontología, Geological Heritage, 56.012.3(234.1), patrimonio geológico, Icnofósiles, Ordovícico, Patrimonio geológico, Trace fossils, Iberian Peninsula

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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