Reappraisal of the Ordovician stratigraphy and paleontology of Trás-os-Montes (Central–Iberian Zone, NE Portugal)

• Artur A. Sá ^[1] ; Carlos Meireles ^[3] ; Carlos Coke ^[1] ; J. C. Gutiérrez Marco ^[2]
  1. [1] Universidade de Trás-os-Montes e Alto Douro

     Universidade de Trás-os-Montes e Alto Douro

     Vila Real (São Pedro), Portugal

     
  2. [2] Universidad Complutense de Madrid

     Universidad Complutense de Madrid

     Madrid, España

     
  3. [3] Instituto Geológico e Mineiro, Departamento de Geologia, Mamede de Infesta, Portugal

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• Localización: Serie correlación geológica, ISSN-e 1666-9479, ISSN 1514-4186, Vol. 17, Nº. 1, 2003
• Idioma: inglés
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  • Ordovician rocks crop out extensively (ca. 760 Km2) in the northern part of the Portuguese Central–Iberian Zone, in an area encircling the parautochthonous and allochthonous terranes of the Galicia – Trás–os–Montes Zone (Figure 1). In contrast with other Ordovician outcrops in Portugal occurring in areas further south (e.g., Valongo, Buçaco, Mação), the stratigraphy and paleontology of Ordovician sequences in the Trás–os–Montes region is very poorly known, as shown by the international syntheses of Hammann et al. (1982: stratigraphic columns 37 and 38) and Romano (1982: columns A1, A3 and A4), both with previous references. More recent contributions improve the knowledge of particular areas (Rebelo and Romano, 1986; Gutiérrez–Marco et al., 1995; Coke, 2000; Meireles, 2000) and fossils (Rebelo and Romano, 1986; Coke and Gutiérrez–Marco, 2001) but despite this, a general view for the entire area remains in an incipient stage.

    This paper represents a progress report with new Ordovician data from the region of Trás–os–Montes, mainly acquired during updated geological mapping as well as a part of the Ph.D. research of the first and second authors.