andelle anticline arques river beauvais bocage boulogne-sur-mer boulonnais butter carboniferous chalk cheese clay cretaceous dairy destination spa english channel epte escarpment forges-les-eaux france fromage frais gaulish language geographic coordinate system geology gournay-en-bray hampshire basin haute-normandie isle of wight jurassic kent natural region oise paris pasture pays de caux permian petit suisse picardie picardy plateau pommeau pontoise reims rouen salisbury plain seine seine-maritime soil somme sussex the lizard vexin wattle and daub weald