Söderfjärden

63.00521.575Koordinaten: 63 ° 0 ' 18 "N, 21 ° 34' 30" E

West Finland |

Söderfjärden is called the level of an impact crater 10 kilometers south of the city of Vaasa in the Finnish region of Ostrobothnia the Gulf of Bothnia. The western part belongs to the municipality of Vaasa, the eastern to the municipality of Korsholm.

Originally from the Ediacaran crater has an age of 560 million years, a maximum diameter of 6.6 km and a maximum depth of 300 m. He is filled with Cambrian sandstone. Only the outer edge is still visible. There is also a buried central elevation.

After the rise of the seabed of the Baltic Sea by the postglacial land uplift Söderfjärden was a wetland but was drained in the 1920s. Today it is used for agriculture and is clearly visible as a large, circular field from the air. This makes Söderfjärden unique among other known impact structures in Finland that are at least partially under water.

Söderfjärden is the northernmost major staging area of the Eurasian cranes in Europe.