Despite sometimes difficult conditions, diggers patiently worked on collecting fossils and studying the stratigraphy and geochemistry of the subsoil. Under the guidance of Jean-Sébastien Steyer, a CNRS researcher at the Muséum national d'histoire naturelle (national museum of natural history) in Paris, they conducted an exciting investigation to reconstruct the environment of the time.
In 2013, beautiful findings crowned the efforts of the palaeontologists, including fossils of plants, insects, sharks, bone fish and tetrapods. After excavating a depth of several metres of oil shale, the diggers finally reached the fish layer from which they carefully extracted slabs. Paleontologist and preparer Gaël de Ploeg makes a passionate description of an astounding shark fossil found among those remains.
This film is a sequel to "Life after the Dinosaurs", a film directed in 2010 by CNRS Images, following Jean-Sébastien Steyer's research work.