1 resultater
The purpose of this report is to present the available data regarding the graphitic schists in the Gjerstad-Kragerø area and to make the data available for explorers and municipal land use planners. The graphite schists that occur southeast of Lake Vegard in the Gjerstad, Kragerø and Tvedestrand area have an average content of graphitic carbon of 2.77 %. Rocks from the abandoned Bjørnås mine have contents up to 33 %.