Lockne is a meteorite crater, located approximately south of the city of

Östersund Östersund (; sma, Staare) is an urban area (city) in Jämtland in the middle of Sweden. It is the seat of Östersund Municipality and the capital of Jämtland County. Östersund is located at the shores of Sweden's fifth-largest lake, Storsjön, ...

in northern Sweden. It has been suggested that it is a doublet with the nearby smaller

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 ...

, apart.Raul Rincon (2014
BBC News: "Ancient Earth hammered by double space impact", 18 March 2014
accessed 19 March 2014. Computer simulations suggest that the asteroid that created the Lockne crater was some in diameter, and the one that carved out Målingen crater was about across. It is in diameter and the age is estimated, based on accompanying chitinozoan

microfossil A microfossil is a fossil that is generally between 0.001 mm and 1 mm in size, the visual study of which requires the use of light or electron microscopy. A fossil which can be studied with the naked eye or low-powered magnification, ...

s, to be 458 million years (

Late Ordovician The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya. ...

). The crater is exposed at the surface. Its fossils, typical of shallow marine environments, show it to be a marine target impact event.

References

Impact craters of Sweden Ordovician impact craters Ordovician Sweden Sandbian Landforms of Jämtland County {{Jämtland-geo-stub