The Siljan Ring (Swedish: Siljansringen) is a prehistoric impact structure in Dalarna, central Sweden. It is one of the 15 largest known impact structures on Earth and the largest in Europe, with a diameter of about 52 kilometres (32 mi).
The Siljan Ring (Swedish: Siljansringen) is a prehistoric impact structure in Dalarna, central Sweden. It is one of the 15 largest known impact structures on Earth and the largest in Europe, with a diameter of about 52 kilometres (32 mi).
Source: Wikipedia "Siljan Ring" · CC BY-SA 4.0
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