El Pintado (base Telychian GSSP, Llandovery: Silurian System), seventh Global Boundary Stratotype Section and Point located in Spain and first in Andalusia (Sierra Morena de Sevilla UNESCO Global Geopark)

Authors

  • Juan Carlos Gutiérrez Marco Instituto de Geociencias (CSIC, UCM) y Área de Paleontología, Dpto. GEODESPAL, Facultad CC. Geológicas, Madrid
  • David K. Loydell School of the Environment, Geography and Geosciences, University of Porthsmouth, Burnaby Road, Portsmouth PO1 3QL, Gran Bretaña https://orcid.org/0000-0003-3967-0047
  • Petr Štorch Institute of Geology CSA, Praha, República Checa https://orcid.org/0000-0001-9653-8734
  • Jiří Frýda Faculty of Environmental Sciences, Czech University of Life Sciences Prague, and Czech Geological Survey, Klárov 3, 118 21 Praha 1 https://orcid.org/0000-0003-2410-3293

DOI:

https://doi.org/10.55407/geogaceta104708

Keywords:

chronostratigraphical classification, GSSP, telychian stage, UNESCO global geoparks, Spain

Abstract

In January 2024, IUGS ratified the proposal of the ICS to designate in southern Spain a replacement GSSP for the base of the Telychian Stage (Silurian System). The previous GSSP for the same stage was established in 1985 in the historical type Llandovery area of southern Wales (UK), but the significant level of imprecision in its definition for the purposes of high resolution biostratigraphical correlation and the discovery of a sedimentary mélange demonstrated that it was not a continuous and adequate section. In 2014, a working group was formed to find a new GSSP. After evaluating sections in Sweden, China, and Spain, the section in Spain was chosen as the sole candidate in 2019. It was officially approved by the ISSS and ICS in 2023. The new replacement GSSP is situated on the northern shore of El Pintado Reservoir, west of Cazalla de la Sierra (Seville province). It is located in a continuous succession of graptolitic black shales, with the FAD of the cosmopolitan graptolite Spirograptus guerichi chosen as the defining criterion for the base of the Telychian Stage. The potential for biostratigraphical and chemostratigraphical correlation with other world sections was clearly demonstrated in a detailed study published in 2015.

References

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Published

2024-12-02

How to Cite

Gutiérrez Marco, J. C., Loydell, D. K., Štorch, P., & Frýda, J. . (2024). El Pintado (base Telychian GSSP, Llandovery: Silurian System), seventh Global Boundary Stratotype Section and Point located in Spain and first in Andalusia (Sierra Morena de Sevilla UNESCO Global Geopark). GEOGACETA, 76, 3–6. https://doi.org/10.55407/geogaceta104708

Issue

Vol. 76 (2024): July-December

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Artículos

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Copyright (c) 2024 Juan Carlos Gutiérrez Marco, David K. Loydell, Petr Štorch, Jiří Frýda

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