The Association of Geologists of Sancerrois offers you the Paleontology workshop: the Oxfordian. This workshop directed by Maëva Perroux and Serge Ducroux will study a stratigraphic stage of the Upper Jurassic, 163 to 157 million years old. On reservation. Opening hours: />Saturday April 9: 3:00:00 p.m. to 5:00 p.m. Saturday January 22: 3:00:00 p.m. to 5:00:00 p.m. Saturday October 15: 3:00:00 p.m. 17:00:00