Preliminary statement of the onshore and offshore meso-cenozoic tectonic data in western Belgium and northern France

A first comparison between the onshore and offshore informations leads to a tectonic sketch of the South North-Sea and the Detroit du Pas-de-Calais (Strait of Dover): The more striking feature is that significant structures (North Hinder and Gravelines structures) seem to extend offshore the transverse faults known in the Paleozoic beds of Pas-de-Calais and Boulonnais. This set of deformations can be interpreted as reactions of the thick Meso-Cenozoic cover to fractures acting in the Paleozoic basement. Towards the South, between the Zone de Cisaillement Nord-Artois and the Faille de Montreuil... Mehr ...