The Neolithic period (stretching from 5000 BC to 2000 BC.) saw the arrival of an agriculture based on slash-and-burn: land is reclaimed from the forest after having fired and is then used for breeding before sprinkling grass. This evolution was made possible by the development of methods of extracting stones and their shaping. In a quarry in Plussulien, about 5000 dolerite axes were extracted per year, representing 40% of the axes of the Breton peninsula. The dissemination of these tools stretched to Paris basin, and 10 copies of these axes were found to Belgium and southern England. The region also imported yellow blond flint blades from Touraine.