Registro de una transgresión marina en torno al tránsito Jurásico-Cretácico al oeste de la sub-cuenca de Penyagolosa (Teruel)

1. S. Campos-Soto ¹
2. E. Caus ²
3. I.I. Bucur ³
4. M.I. Benito ¹
5. P. Suarez-Gonzalez ¹
6. I.E. Quijada ⁴
7. L. Fernández ¹
8. R. Mas ¹

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Abstract

The Villar del Arzobispo Fm is a mixed siliciclastic-carbonate unit, which is considered as the unit that represents the culmination of the Late Jurassic-basal Cretaceous regressive trend in the southeastern Iberian Basin. In the western Penyagolosa sub-basin (Maestrazgo Basin) this unit is formed, in its lower part, by an alternation of marine limestone, sandstone and siliciclastic mudstone and, in the middle and upper part, by siliciclastic mudstone and sandstone alternating with limestone, which is progressively more abundant towards the uppermost part of the unit. This limestone is formed by peloids, bioclasts and ooids and contains abundant marine fossils. The presence of these marine facies demonstrates that a transgression took place during the sedimentation of the upper part of the unit. The micropaleontological study reveals the presence of a foraminifera association dominated by Anchispirocyclina lusitanica and the dasyclad algae Zergabriella embergeri, indicating that the transgressive episode took place during the Upper Tithonian-Lower Berriasian? interval.

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