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The Proterozoic rock pebbles of the basal Ordovician conglomerate in the Siljan Ring structure and their significance

 

作者: FransE. Wickman,   JanOlov Nyström,  

 

期刊: Geologiska Föreningen i Stockholm Förhandlingar  （Taylor Available online 1984）
卷期: Volume 106, issue 3  

页码: 215-218

 

ISSN:0016-786X

 

年代: 1984

 

DOI:10.1080/11035898509454638

 

出版商: Taylor & Francis Group

 

关键词: Astrobleme;Ordovician transgression;paleogeography;Siljan Ring;Dalarna;Central Sweden;N 6050 N 6115 E 1520 E 1430

 

数据来源: Taylor

 

摘要:

It has been postulated that during the formation of an impact crater, fragments from the bedrock mainly move radially with respect to the impact center. The result of rock counts in the Ordovician basal conglomerate from five localities in the Siljan Ring structure is consistent with this hypothesis. The distribution of rock types occurring as pebbles in the allochthonous conglomerate varies from locality to locality, reflecting the Proterozoic bedrock of each radial sector from the impact center.

 

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