Nearly the whole county overlies a bed of rocks of the talcose schist formation. In the western part this bed is cut by a range of gneiss which has an average width of about five miles and extends the whole length of the county. In the eastern part there extends a parallel vein of clay slate, bearing a mean width of about one mile. Soapstone is found in Waterville, Johnson, and near Sterling pond. In Wolcott there is an inexhaustible whetstone ledge. Wolcott and Elmore have a large copper-bed which will be, some day, a great place for mining. Ochre is found in Hyde Park and Cambridge, and near Sterling pond. Lead is also said to have been discovered by the Indians in Belvidere. Veins of gold and silver have also been discovered, but not in quantities sufficient to warrant remunerative working.