PLANETOBSERVER / SCIENCE PHOTO LIBRARY PLANETOBSERVER / SCIENCE PHOTO LIBRARY
Siljan Ring crater, satellite image. Satellite image of Dalarna in central Sweden, showing the Siljan lake (blue, centre). The lake is located around the south-western perimeter of the Siljansringen (Siljan Ring), a meteor impact crater which was formed around 377 million years ago, during the Devonian period. The original crater is now heavily eroded but is estimated to have been about 52 kilometres in diameter and is the largest known impact crater in Europe (excluding Russia). The Siljian meteor impact crater is situated in the south-eastern part of Qaraghandy Province, Kazakhstan. It is thought to have been formed around 45 million years ago, during the Eocene epoch and measures approximately 55 kilometres in diameter.
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