New collecting of ammonites and inoceramid bivalves from Cretaceous-Tertiary boundary sections exposed al Sopelana Zumaya, Spain, Hendaye Bidart (Biarritz), France, has led to better understanding molluscan biostratigraphy in each these coastal exposures. Ali can be lithologically correlated. At all the sections, have now been found within last meter Cretaceous. Also, disappear near base A . ma...

In 2013, Andra (French National Radioactive Waste Management Agency) drilled boreholes to the south-east of Paris Basin, characterise Aptian and Albian clayey formations, including ‘Argiles à Plicatules’ Formation dated as early Aptian. One these intersected this formation with an excellent recovery allowing detailed biostratigraphy (ammonites), sedimentology, clay mineralogy, isotope geochemis...