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Sedimentology of Upper Ordovician regressive strata in Västergötland

 

作者: Sven Stridsberg,  

 

期刊: Geologiska Föreningen i Stockholm Förhandlingar  （Taylor Available online 1980）
卷期: Volume 102, issue 3  

页码: 213-221

 

ISSN:0016-786X

 

年代: 1980

 

DOI:10.1080/11035898009455160

 

出版商: Taylor & Francis Group

 

关键词: Sedimentation;changes of level;eustasy;regression;corals;oolitic texture;Dalmanitina Beds;Ulunda Mudstone;Jonstorp Formation;Nittsjö Formation;Rastrites Shale;Hirnantian;Jerrestadian;Ashgillian;Llandoverian;new localities;Billingen;Mösseberg;Var

 

数据来源: Taylor

 

摘要:

The sedimentology of the upper Ashgillian Dalmanitina Beds in the Billingen-Falbygden area in Västergötland is studied. They exhibit facies of shallow-water type. In contrast, the underlying Ulunda, Jonstorp and Nittsjö formations (‘Tretaspis Shales’) and the overlying Llandoverian Rastrites Shale were formed in notably deeper water. A possible explanation for the short-term shallowing, which was accompanied by the development of bahamitic sediments, such as peloids and ooids, would be that a large mass of water became bound in the ice cap that covered part of Gondwanaland.

 

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