EI límite Dogger-Malm en la Cordillera Ibérica: anomalías geóquímicas y fenómenos asociados

• Guillermo Meléndez Hevia ^[1] ; Leandro Sequeiros San Román ^[2] ; W. Brochwicz-Lewiñski ^[3] ; T. A. Gasiewicz ^[4] ; S. Suffzynsky ^[4] ; K. Szatkowski ^[4] ; M. Zbik ^[5] ; R. Tarkowski ^[6]
  1. [1] Universidad de Zaragoza

     Universidad de Zaragoza

     Zaragoza, España

     
  2. [2] Universidad de Sevilla

     Universidad de Sevilla

     Sevilla, España

     
  3. [3] lnstitute of Geology. Rakowiecka. Varsovia, Polonia.
  4. [4] Rakowiecka, Varsovia, Polonia.
  5. [5] Faculty of Geology. Al. Zwirki i Wigury Varsovia, Polonia
  6. [6] Geociencias. Medio Ambiente

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• Localización: Geogaceta, ISSN 0213-683X, Nº. 2, 1987, págs. 5-7
• Idioma: español
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• Resumen

  • The hypothesis put forward by Raup and Sepkoski, linking major mass extintions with cyclic cosmic catastrophes, focussed attention on several geological boundaries. This was also the case of the Middle/ Upper Jurassic boundary in Poland and Spain (lberian Chain).

    Sorne 11rare events>> have been detected: possible submarine corrosion processes, lranomal y and high enrichment in heavy metals (Fe, Mn, Ni, Co, Ra and Pt), cosmic dust, etc.