New Pragian (Lower Devonian) fossils from the Courel Mountains Global UNESCO Geopark (Lugo, NW Spain) and its geological implications Nuevos fósiles del Pragiense (Devónico Inferior) del Geoparque Mundial de la UNESCO Montañas do Courel (Lugo, NO de España) y sus implicaciones geológicas
| Autor: | Lorenzo, X. C. B., Gutiérrez-Marco, J. C., Cózar, P., Olev Vinn, Ballesteros, D., Vila, R., Alemparte, M. |
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| Přispěvatelé: | Junta de Andalucía |
| Rok vydání: | 2022 |
| Zdroj: | Scopus-Elsevier |
| Popis: | For the first time, Devonian fossils are recognized in limestones of the Sil synclinorium (Lugo, NW Spain). Within this tectonic structure, the outcrop was interpreted as belonging to Ordovician shales, although observation of Devonian strata recommended a more detailed stratigraphical and tectonic investigation of the area. The palaeontological site contains an exceptional accumulation of dacryoconarids, apparently monospecific (Nowakia cf. acuaria (Ritchter)), a group never recognized before in Galicia. This species allows the attribution of these limestones to the Pragian (Lower Devonian), which are roughly correlated with the upper part of the Salas Formation of the eastern end of the synclinorium, in León province. An alternative interpretation would be to consider this limestone block as an olistolith at the base of the Carboniferous olistostrome + flysch of San Clodio. Taking into consideration the palaeontological, stratigraphical and structural interest of the outcrop, it has been inscribed as a new Geosite of the Courel Mountains Global UNESCO Geopark. Los autores agradecen a Carlos Alonso (Universidad Complutense de Madrid) la composición fotográfica de la Fig. 2, así como al prof. José Ignacio Valenzuela Ríos (Univ. de València) y a un revisor anónimo, por sus acertados comentarios y sugerencias. El presente trabajo forma parte del programa de investigación geológica financiado por el Geoparque Montañas do Courel. DB cuenta con financiación del Plan Andaluz de Investigación, Desarrollo e Innovación 2021. |
| Databáze: | OpenAIRE |
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