Descubrimiento de Graptolitos arenigienses en la escama de Rioseco (Zona Cantábrica, N. de España)
Loading...
Download
Official URL
Full text at PDC
Publication date
1987
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Seminario de Estudos Galegos. Area de Xeoloxía e Minería ; Instituto Universitario de Xeoloxía "Isidro Parga Pondal"
Citations
Exportar
Citation
Abstract
En este trabajo se da a conocer el hallazgo de Azygograptus undulatus CHEN y XIA en un tramo pelítico-arenoso situado por encima de la Cuarcita de Barrios s.str. dentro de la escama de Rioseco, que se equipara convencionalmente a la «serie de transición» de otras localidades asturianas. La especie mencionada permite atribuir al Arenig estos niveles, siendo la primera vez que se registra su presencia fuera de China.
Graptolites have been collected for the first time from the «transitional beds» overlying the Barrios Formation (=Armorican Quartzite) in a single locality of eastern Asturias (N. Spain), within the Cantabrian zone of the Hesperian Massif (fig. 1). The studied material pertains to a dichograptid species with singlestiped rhabdosome and distinctive prothecal folds (fig. 2). It has been identified and described as Azygograptus undulatus CHEN & XIA, constituting thus the first report of this species outside China.
Graptolites have been collected for the first time from the «transitional beds» overlying the Barrios Formation (=Armorican Quartzite) in a single locality of eastern Asturias (N. Spain), within the Cantabrian zone of the Hesperian Massif (fig. 1). The studied material pertains to a dichograptid species with singlestiped rhabdosome and distinctive prothecal folds (fig. 2). It has been identified and described as Azygograptus undulatus CHEN & XIA, constituting thus the first report of this species outside China.