Siljan Ring 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 the Devonian period, about 376.8 ± 1.7 Ma. This coincides around the first Devonian extinction, the Kellwasser Event or Late Frasnian extinction at 376.1 Ma ± 1.6 Ma. The effects of the impact can clearly be seen in the bedrock in the area. The Cambrian,
Mora–Siljan Airport canceled, since the Swedish Transport Administration, which procured the Arlanda–Sveg route, did not accept the line being combined with the Arlanda–Mora route. This has been processed in court and also appealed to the EU Commission, which gave the Swedish Transport Administration the right to have their agreements for themselves. Mora Municipality has chosen not to procure its own line because it would mean significantly higher costs. The train is considered a future means of transport, unless the government gives directions to the Swedish Transport Administration to procure the line. The Transport Administration only procured air routes where alternative transport (ground