In early 2018 there were eight known
impact craters
An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters ...
in
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...
. They range in age from 90
mya
Mya may refer to:
Brands and product names
* Mya (program), an intelligent personal assistant created by Motorola
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* Midwest Young Artists, a comprehensive youth music program
Codes
* Burmese ...
to 470 mya, and in diameter from 1 km to 52 km. Six of them are exposed, that is they are visible at the surface, in the natural landscape, although their nature and origin might need to be pointed out to the untrained layman.
List
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Dellen
Dellen is a lake system in the province of Hälsingland, Sweden. It consists of two lakes, ''Northern Dellen'' and ''Southern Dellen'', appreciated among fly-fishermen for their population of brown trout.
Southern Dellen has a surface area of 52& ...
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Granby crater
Granby is an impact crater in Östergötland, Sweden, located to the southeast of Vadstena. It is estimated to have formed about 470 million years ago (Middle Ordovician
The Ordovician ( ) is a geologic period and System (geology), system, the s ...
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Hummeln structure
The Hummeln structure was confirmed, in 2015, as an impact crater in Småland province, Sweden. It is a wide depression within Lake Hummeln and is estimated to have formed between 470 and 443 Ma ago, during the Ordovician.
Description
The ...
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Lockne crater
Lockne is a meteorite crater, located approximately south of the city of Östersund in northern Sweden. It has been suggested that it is a doublet with the nearby smaller Målingen Crater, apart.Raul Rincon (2014BBC News: "Ancient Earth hammere ...
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Målingen Crater
Målingen was confirmed as an impact crater in 2014. It is located near the city of Östersund in northern Sweden. It is "probable" that it formed simultaneously with the nearby Lockne crater.Raul Rincon (2014)BBC News: "Ancient Earth hammered by ...
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Mien (lake)
Mien is a lake in southern Sweden, 12 km (7.5 mi) southwest of the town of Tingsryd. The lake is formed within a meteorite crater.
The eroded crater is marked by a 5.5-km (3.4-mi) diameter circular lake (Lake Mien).
The original ...
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Siljan Ring
The Siljan Ring ( sv, 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 . The impact that created the Siljan Ring ...
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Tvären Tvären is a circular bay close to Studsvik, Sweden.
Within the bay is an ancient buried impact crater about 2 km in diameter. It was first identified using reflection seismology. The crater is estimated to be about 455 million years old (L ...
See also
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Ordovician meteor event
The Ordovician meteor event was a dramatic increase in the rate at which L chondrite meteorites fell to Earth during the Middle Ordovician period, about 467.5±0.28 million years ago. This is indicated by abundant fossil L chondrite meteorites in ...
[H. Haack et al. ''Meteorite, asteroidal, and theoretical constraints on the 500-Ma disruption of the L chondrite parent body'', Icarus, Vol. 119, p. 182 (1996).]
References
{{Commons category, Impact craters of Sweden
Geology of Sweden
Landforms of Sweden