 Elsewhere, intramontane basins such as Fohnsdorf, Tamsweg and Lavantall formed, accumulating mountain debris and coal.The Molasse Sea-Paratethys Ocean extended into the Vienna, Styrian and Pannonian basins, which became isolated as the Pannonian Lake 12 million years ago.Volcanoes were active until 15 million years ago, as a result of volatiles subducted with the Penninic Ocean crust melting rock, found in Bad Gleichenberg and Weitendorf, villages both in Styria.