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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Vaasan Soderfjärden sedimenttiaineksen suojaama kambrikaudella muodostunut kraatteri. (Soderfjärden, Vaasa, western Finland: a crater covered with sedimentary material since its formation in the Cambrian)

Auteur :
LEHTOVAARA, J.

Description :
The Soderfjärden crater has a diameter of 5-6 Km and its maximum depth exceeds 300 m in a peripheral ring which is covered with Lower Cambrian sedimentary rocks more than 200 m thick. Firm evidence of the process that formed the crater has been difficult to find, as the meteorite-impact features are rather weak and there is no lava that might indicate a volcanic explosion. The rapid filling of the crater may be interpreted as favouring the theory that it originated under a shallow Cambrian sea that checked the destructive power of a meteorite. Such craters are relatively frequent phenomena in the neighbourhood.


Type de document :
Article de périodique

Source :
Terra Helsinki, 1984, vol. 96, n°. 1, p. 23-33, Références bibliographiques : 44 réf.

Date :
1984

Langue :
Finnois
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)