Keurusselkä

The Keurusselkä is a lake in the Finnish landscapes of Central Finland and Pirkanmaa.

The lake is located between the two cities Keuruu in the north and in the south Mänttä. He, together with the Ukonselkä, which adjoins the west, a lake system. The common water area amounts to 118.2 km ². The average water depth is 4.88 m. The maximum depth is 40.99 m. The water table is at a height of 105.5 m.

The Keurusselkä drains to the south lake Kuorevesi and further west to Ruovesi and Näsijärvi, which lies within the catchment area of ​​Kokemäenjoki.

Due to the Chernobyl accident in 1986, the region was heavily radioactively contaminated to the Keurusselkä. However, the captured fish in the lake are considered safe.

Impact craters

The Keurusselkä covered the remains of an impact crater, which was discovered in 2003 by amateur geologist.

Cone of rays and corresponding rock formations, as typically caused by meteorite impacts, were found within a radius of about 6 km. This area may be only the central peak ( 62.13333324.6 ⊙ ) and the original crater diameter would measure about 30 km. The age of the crater is estimated to be 1,144 ± 10 million years.

Only 30 km east of the center of the Keurusselkä impact structure is the Karikkoselkä, a much smaller and younger impact structure.

The Ukonselkä, an almost circular lake just west of Keurusselkä is also listed as an impact structure.