Revisión de la litoestratigrafía del flanco norte de Sant Corneli (Pirineos centro-meridionales, Cretácico Superior)

• Autores: Eulàlia Gili Folch, Peter W. Skelton, Enric Vicens Batet, Antoni Obrador Tuduri, Gregorio López Sanjaume
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 3, 2, 2001 (Ejemplar dedicado a: XIV Congreso Nacional de Sedimentología, IV Congreso del Cretácico de España), págs. 209-212
• Idioma: español
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• Resumen

  • We present a revised formal lithostratigraphy for the Sant Corneli Fm. (Santonian) on the northern flank of the Sant Corneli Anticline, ENE ofTremp, southern Central Pyrenees. It overlies the Montagut limestones and is overlain by the Herba-Savina marls and marly limestones. Five members are recognized, three o f which are included in a newly defined type section in the western part of the outcrop. This section (196 m) exposes a lower and an upper tongue of the Aramunt Veil Mb., separated by an eastward-thickening wedge consisting of the Sant Pere de Vilanoveta Mb. (new name) and overlying I'Aubagueta Mb. (new name). The Aramunt Veil Mb. comprises numerous coarsening-up cycles, each a few metres thick, of nodular silty marls and yellow-brown weathering, miliolid-rich bioclastic calcarenites. Its two tongues unite westwards to encompass the entire thickness of the formation. The Sant Pere de Vilanoveta Mb. contains coarsening-up cycles of coral-rich marls and marly limestones, rudist lithosomes and bioclastic floatstones andgrainstones.

    The I'Aubagueta Mb. contains marly limestones and silty clays. Eastwards, two further members represent slope deposits that originally adjoined the platform, though now separated from it by a NW-SE trending normal fault. The Llau de Castellet Mb. (new name) comprises orange-brown marls and marly limestones laterally equivalent to the lower Aramunt Veil tongue. The overlying Llau de Joncarlat Mb. (new name) consists of white marls and marly limestones