That same year, thanks to a water subsidence, Hippolyte Müller took soundings on the site of the " Baigneurs " bringing to light flint implements he thought to be dating from the Neolithic Age, and discovered, in a recently dug channel in Colletière, thick strata of peat with high pottery and objects content . However, he did not start any real excavation and thus left the site of Colletière undamaged. In 1971, a municipality project to build a little harbour on this site arouse the archaeologists reaction. | |
Once the destruction danger stopped, rescue excavations started in January of 1972. These were the first stratigraphic excavations of an underwater settlement in France, using specific and improved techniques. Since then, such an excavation takes place each year. |