The Plateau d'Alzu is an archaelogical site located in the north of Corsica, at a height of around 1600 meters. A survey programme started in 2007 lead to the discovery of a rhyolite deposit, and a lot of neolithic chipped stone in this material. This survey, also lead to the identification of many rock shelters, with neolithic material, located a few hundred meters from the deposit. Since 2016, these numerous discoveries (from raw material to tools) and the site's geographical arrangement lead to an excavation. The proximity between rock shelters and the deposit, is an opportunity to study the complementarity between archaelogical sites, in an restricted area. The preliminary results of the excavation, confirm the Neolithic assignment and allowed the identification of a rhyolite exploitation area and a settlement area under a rock shelter, with lots of debitage product, arrowheads in particular.