THE PIRACY OF THE GRAND-MORIN RIVER BY TH E MARNE RIVER (PARIS BASIN,FRANCE) - CHRONOLOGY AND MECHANISM

The piracy of the Grand-Morin river by the Marne river (Paris Basin, F rance): Chronology and mechanism. Drillings were undertaken in the fos sil lower valley of the Grand-Morin river near Esbly. They date its pi racy by the Marne river from the Late Glacial (Early Dryas probably). This capture is related to a braided channel flowing on the raised bed of Pleniglacial and Late Glacial alluvium. However, this piracy was p repared by the migration of the meanders of the two rivers during the Middle Pleistocene.