CHARACTERIZATION OF A CARBONIFEROUS FOREL AND BASIN IN THE PYRENEES -FACIES, TIMING OF SYNSEDIMENTARY TECTONISM

A foreland basin has been characterized in the pre-Stephanian Carbonif erous series of the Pyrenees. The carbonate series, where storm deposi ts have been recognized in the ''Calcaires a laminites'' Formation, co rrespond to a platform retrograding towards the south-west. The Culm i s interpreted as a syntectonic turbidite series including channelized siliciclastic systems and slope-apron carbonate systems fed by the col lapse of platforms which were established on a northeastern orogenic m argin. The diachronism of the carbonates-Culm boundary indicates the m igration of the orogenesis from Late Visean to Westphalian.