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The Siljan Ring (Swedish: Siljansringen) i … The Siljan Ring (Swedish: Siljansringen) 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 52 kilometres (32 mi). 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, Ordovician and Silurian sedimentary rocks deformed by the impact are rich in fossils. The area around the Siljan Ring has been the site of recent prospecting for oil and natural gas, though none of the projects has so far been commercially viable. There are large deposits of lead and zinc near Boda at the eastern edge of the Ring. There are several lakes in the vicinity, the largest of which is Siljan on the south-southwestern edge of the crater, with the smaller Orsa Lake to the west and Skattungen and Ore on the northeastern margin.tungen and Ore on the northeastern margin.
, Le cratère de Siljan (en suédois Siljansri … Le cratère de Siljan (en suédois Siljansringen : « anneau du Siljan ») est un cratère d'impact météoritique, d'un diamètre de 52 km situé en Dalécarlie en Suède. C'est un des 15 plus grands cratères connus au monde, et le plus grand en Europe (hors Russie). Il est le résultat de la collision d'une météorite avec la surface de la Terre il y a 376,8 ± 1,7 millions d'années.erre il y a 376,8 ± 1,7 millions d'années.
, Siljansringen i Dalarna är Europas största … Siljansringen i Dalarna är Europas största nedslagskrater (astroblem), med en diameter på cirka 52 km. Kratern skapades då en meteorit med en diameter av ca 5 km slog ned och träffade jordens yta under devon för cirka 365 eller 370 miljoner år sedan. Astroblemets kanter bildar en cirkel av lägre liggande områden, som idag innehåller många insjöar, varav Siljan är den största. Andra sjöar i Siljansringens kanter är Orsasjön, Skattungen och Oresjön. Nedslagets effekter syns också tydligt i berggrunden i området då de ordoviciska och siluriska bergarterna ligger som en ring i området. bergarterna ligger som en ring i området.
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| rdfs:comment |
Le cratère de Siljan (en suédois Siljansri … Le cratère de Siljan (en suédois Siljansringen : « anneau du Siljan ») est un cratère d'impact météoritique, d'un diamètre de 52 km situé en Dalécarlie en Suède. C'est un des 15 plus grands cratères connus au monde, et le plus grand en Europe (hors Russie). Il est le résultat de la collision d'une météorite avec la surface de la Terre il y a 376,8 ± 1,7 millions d'années.erre il y a 376,8 ± 1,7 millions d'années.
, Siljansringen i Dalarna är Europas största … Siljansringen i Dalarna är Europas största nedslagskrater (astroblem), med en diameter på cirka 52 km. Kratern skapades då en meteorit med en diameter av ca 5 km slog ned och träffade jordens yta under devon för cirka 365 eller 370 miljoner år sedan. Astroblemets kanter bildar en cirkel av lägre liggande områden, som idag innehåller många insjöar, varav Siljan är den största. Andra sjöar i Siljansringens kanter är Orsasjön, Skattungen och Oresjön. Nedslagets effekter syns också tydligt i berggrunden i området då de ordoviciska och siluriska bergarterna ligger som en ring i området. bergarterna ligger som en ring i området.
, The Siljan Ring (Swedish: Siljansringen) i … The Siljan Ring (Swedish: Siljansringen) 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 52 kilometres (32 mi). 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, Ordovician and Silurian sedimentary rocks deformed by the impact are rich in fossils.eformed by the impact are rich in fossils.
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Cratère de Siljan
, Siljan Ring
, Siljansringen
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