The protohistoric occupation north-west of Caen seems to be mainly guided by the hydrographie network of the La Seulles river coastal basin. During the La Tène period, seulement densification is revealed by clusters of enclosures separated by the short tributaries of the La Seulles river. On the limited area of Thaon, several Iron age farms could have been organized together during the 2nd and 1st centuries B.C.. Most of them would have been abandonned before the end of the first half of the lst century B.C.. Of the eiglit sites sampled, only one shows an occupation stretching from the late La Tène period up to the first half of the 1st century A.D, probably uninterrupted. During the Middle and Late La Tène periods, arable fanning is clearl...