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(Article of periodic en Finnois - 1984)

Document title

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

Authors(s) and Affiliation(s)

LEHTOVAARA J. ;

Abstract

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.

Source

Article of periodic

published at : Terra Helsinki

Editor :

Millesime : 1984, vol. 96, no1 [pp. 23-33]

Bibliographic references : 44 réf.

Language

Finnois

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