La discordancia de Moyuela (Zaragoza): precisiones sobre la tectónica extensional en el límite Oxfordiense-Kimmeridgiense en la Cuenca Ibérica

• Aurell, M. ^[1] ; Pérez Urresti, I. ^[1] ; Ramajo, J. ^[1] ; Meléndez, G. ^[1] ; Bádenas, B. ^[1]
  1. [1] Universidad de Zaragoza

     Universidad de Zaragoza

     Zaragoza, España

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 22, 1997 (Ejemplar dedicado a: 22ª Sesión Científica, Bilbao 1997), págs. 23-26
• Idioma: español
• Títulos paralelos:
  • The angular unconformityof Moyuela (Zaragoza: remarks on extensional tectonic events at the Oxfordian Kimmeridgian boundary in the lberian basín
• Enlaces
  • Texto completo (pdf)
• Resumen

  • An angular unconformity has been Jound at the lower part of the Sot de Chera Fm. near the village of Moyuela (Northern Iberian Chain, NE Spain). This unconformity develops during a tectonic extension at the turn of the Oxfordian-Kimmeridgian stages. Biostratigraphic and taphonomic analyses of the ammonite succession reveal a small statigraphic gap at the top of the Yátova Fm., party affecting the Bimammatum and Hauffianum Subzones. The lower part of the overlying Sot de Chera Fm. has been accurately dated as Galar Subzone by the common ocurrence of Sutneria galar (OPPEL). This provides a precise dating of the tilting phase responsible for the observed angular unconformity. The unconformity of Moyuela confirms previous interpretations about the regional extension of a tectonic event which involved tilting of blocks during the deposition of the Sot de Chera marly Fm. and would give further support to setting the Oxfordian-Kimmeridgian boundary below the Planula Zone, at the base of Hauffianum Subzone.