The Suavjarvi Structure: an Early Proterozoic Impact Site on the Fennoscandian Shield

Details The Suavjarvi Structure: an Early Proterozoic Impact Site on the Fennoscandian Shield The Suavjarvi Structure: an Early Proterozoic Impact Site on the Fennoscandian Shield

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..825m&link_type=abstract

Lunar and Planetary Science, volume 27, page 825

Physics

Craters: Impact, Planar Features, Precambrian, Shock Metamorphism

Scientific paper

Due to special investigations carried out in the eastern part of Fennoscandian shield, 9 objects which possibly represent the deeply eroded ancient (pre-Vendian) impact structures were distinguished there. For the one of these, the Suavjarvi, the discovery of shock features, combined with cosmic imagery, gravity and magnetic evidences, and occurrence of specific polymict breccia, gave proofs of its impact origin. The structure which is transformed intensely by consequent regional metamorphism and erosion is about 16 km in diameter, and its age is estimated to be about 2.4 b.y.

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