Lake Lappajärvi
Encyclopedia
Lappajärvi is a lake in Finland, in the municipalities of Lappajärvi
, Alajärvi
and Vimpeli
. It is formed in a 23 km (14.3 mi) wide meteorite
crater
. The age of the crater is estimated to be 73.3 million years old (±5.3 million years)—the upper Cretaceous
period. The lake is part of Ähtävänjoki basin together with Lake Evijärvi
that is located downstream of it.
Lappajärvi
Lappajärvi is a municipality in Finland. It is located in the province of Western Finland and is part of the Southern Ostrobothnia region. The municipality has a population of and covers an area of of which is water...
, Alajärvi
Alajärvi
Alajärvi is a town and municipality of Finland.It is located in the province of Western Finland and is part of the Southern Ostrobothnia region. The town has a population of and covers an area of of which is water...
and Vimpeli
Vimpeli
Vimpeli is a municipality of Finland.It is located in the province of Western Finland and is part of the Southern Ostrobothnia region. The municipality has a population of and covers an area of of which is water...
. It is formed in a 23 km (14.3 mi) wide meteorite
Meteorite
A meteorite is a natural object originating in outer space that survives impact with the Earth's surface. Meteorites can be big or small. Most meteorites derive from small astronomical objects called meteoroids, but they are also sometimes produced by impacts of asteroids...
crater
Impact crater
In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...
. The age of the crater is estimated to be 73.3 million years old (±5.3 million years)—the upper Cretaceous
Cretaceous
The Cretaceous , derived from the Latin "creta" , usually abbreviated K for its German translation Kreide , is a geologic period and system from circa to million years ago. In the geologic timescale, the Cretaceous follows the Jurassic period and is followed by the Paleogene period of the...
period. The lake is part of Ähtävänjoki basin together with Lake Evijärvi
Lake Evijärvi
Lake Evijärvi is a lake of Finland in Evijärvi, Southern Ostrobothnia region. The lake is part of Ähtävänjoki basin.-References:* *...
that is located downstream of it.