Siljan Ring proved inconclusive. Drilling for natural gas was resumed in the late 2000s and continues as of mid-2012. The scientific premise for prospecting of this sort is based on the work of physicist Vladimir Kutcherov, who is cooperating with Igrene, the company financing the drilling operations. Siljan Ring The Siljan Ring () is a prehistoric impact crater in Dalarna, central Sweden. It is one of the 15 largest known impact craters on Earth and the largest in Europe, with a diameter of about . The impact that created the Siljan Ring occurred when a meteorite collided with the Earth's surface during
Siljan, Norway parish) is named after the old "Siljan" farm (Old Norse: "Seljur"), since the first church was built there. The name is (probably) the plural form of "selja" which means "sallow tree" or "willow". Prior to 1918, the name of the municipality was "Slemdal". The coat-of-arms is from modern times. They were granted in 1989. The arms show three white saw blades on a green background. It was chosen to represent the timber industry of the municipality. Siljan, Norway Siljan is a municipality in Telemark county, Norway. It is part of the traditional region of Grenland. The administrative centre of the