Primeros resultados magnetoestratográficos del Triásico Medio-Superior (Ladiniense-Karniense)en la cordillera Ibérica occidental (cuevas de Ayllón)

  1. Ruiz, V.C.
  2. Sopeña, A.
  3. Rey, D.
  4. Villalaín, J.J.
  5. Gialanella, P.R.
  6. Osete, M.L.
Revista:
Geogaceta

ISSN: 0213-683X

Ano de publicación: 1998

Número: 25

Páxinas: 179-182

Tipo: Artigo

DIALNET GOOGLE SCHOLAR lock_openArias Montano editor

Outras publicacións en: Geogaceta

Resumo

A magnetostratigraphic investigation on a Middle-Late Triassic section outcropping at Cuevas de Ayllon (westernmost margin of the Iberian Ranges, Spain) has been performed. The section mostly consists of a thick sequence of interbedded mudstones and sandstones. The age of the sampled formation has been established as Ladinian-Karnian on the basis of palynological assemblages. 123 samples were subjected to a progressive thermal demagnetization up to 680 °C.A multicomponent magnetization behaviour has been observed. The characteristic component could be isolated from 575-620 °C up to 680 ° C, in 74 samples showed both polarities and allowed to define a consistent magnetic zonation. The data presented will contribute to the construction of a standard polarity scale for the Triassic time span

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