Publication: Estudio palinológico del tránsito
Pliensbaehiense/Toarciense en la Rambla
del Salto (Sierra Palomera, Teruel, España)
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Publication Date
1999
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Universidad Complutense de Madrid. Departamento de Estratigrafía
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Abstract
El estudio palinológico de los materiales correspondientes al tránsito Pliensbachiense/Toarciense en la Rambla del Salto (Sierra Palomera, Teruel, España), ha permitido identificar veintiún taxones pertenecientes a distintos grupos de protoctistas, criptógamas vasculares y gimnospermas. Por el momento, ninguno de ellos ha resultado ser relevante desde el punto de vista bioestratigráfico. Se han distinguido dos intervalos caracterizados por su riqueza en elementos planctónicos, cuyas asociaciones palinológicas son de difícil comparación con las de otras cuencas europeas. En los materiales del Toarciense inferior, a partir de las muestras obtenidas en sedimentos del tránsito entre las Subzonas Mirabile y Semicelaíum, tiene lugar la desaparición de los taxones planctónicos y ello podría estar relacionado con el evento subóxico reconocido en otros puntos de la cuenca.
A palynological study carried out at the Pliensbachian-Toarcian passage beds of the Rambla del Salto section (Teruel province, E. Spain) has led to the identification of twenty-one taxa belonging to sorne different groups of Protoctista, gymnospenn and vascular criptogamme plants. The identified taxa show a wide stratigraphic range and have low biostratigraphic value. Two separate intervals are distinguished by their content in planktic elements. In both intervals palynologic associations are difficult to compare with other european basins. Recorded planktic taxa disappear at the Mirabile-Semicelatum Subzone transition (lower Toarcian). This might be related with the suboxie events which has been recognised elsewhere in some other areas in the basin.
A palynological study carried out at the Pliensbachian-Toarcian passage beds of the Rambla del Salto section (Teruel province, E. Spain) has led to the identification of twenty-one taxa belonging to sorne different groups of Protoctista, gymnospenn and vascular criptogamme plants. The identified taxa show a wide stratigraphic range and have low biostratigraphic value. Two separate intervals are distinguished by their content in planktic elements. In both intervals palynologic associations are difficult to compare with other european basins. Recorded planktic taxa disappear at the Mirabile-Semicelatum Subzone transition (lower Toarcian). This might be related with the suboxie events which has been recognised elsewhere in some other areas in the basin.