The Le Danois Contourite Depositional System: an exceptional record of the MOW circulation of the North Iberian margin

• Autores: Francisco Javier Hernández Molina, J. Iglesias Moscoso, D. Van Rooij, Gemma Ercilla Zárraga, María Gómez Ballesteros, Diego Casas Ripoll, Estefanía Llave Barranco
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 10, 2008 (Ejemplar dedicado a: VII Congreso Geológico de España), págs. 535-538
• Idioma: español
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• Resumen

  • This contribution aims to illustrate the Le Danois Contourite Depositional System (DCDS), an impressive example of a contourite system located on the Cantabrian margin. A description of main morphosedimentary features is presented. This work is based on several datasets, including: swath bathymetry data and high and middle resolution reflection seismic profiles from TOPAS, sparker and airgun systems. The main depositional features are: a) elongated mounded and separated drifts; b) plastered drifts; and c) sediment waves. The main erosive features are: a) moats, b) scours alignments and c) sub-circular holes structures, and d) slides scars. The DCDS is a consequence of the Mediterranean Outflow Water (MOW) and its interaction with the sea floor along the slope. It develops after the Lower Pliocene, but the present depositional and erosive features started to be developed after the Mid- Pleistocene Revolution (MPR).