The Bergerac guaranteed vintage area « terroirs »

The vineyard of Bergerac, a guaranteed vintage, is situated in the mid-Lot valley, which has siliceous terraced rows on its hillsides, and on its bordering plateaux, composed of limestone and clay of the tertiary geological eras. In order to study and do a cartography of the « terroirs » in the 91 rural districts which include the area concerned (a project commissioned by the locals and european authorities), we defined a scale comprising twelve criterions for differentiating the « terroirs »; this enabled us to describe and do a cartography of them on a scale of 1/10 000. This study comes within the scope of a regional politic of cartography of the « terroirs », to give a toll of recomposition of the guaranteed vintage in the south-west of France.