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Notes on the structure and relations of the pre‐cambrian and ordovician rocks of southwestern lleyn (Caernarvonshire)

 

作者: R. M. Shackleton,  

 

期刊: Geological Journal  （WILEY Available online 1954）
卷期: Volume 1, issue 4  

页码: 400-409

 

ISSN:0072-1050

 

年代: 1954

 

DOI:10.1002/gj.3350010408

 

出版商: John Wiley&Sons Ltd

 

数据来源: WILEY

 

摘要:

AbstractThe oldest visible Pre‐Cambrian rocks in Lleyn are pillow lavas and sediments of the Gwna Group. They are succeeded by rhyolitic tuffs (Gwyddel Beds). Schists and gneisses have been formed from these rocks. The Sarn adamellite intrusion is related to the gneisses. The Pre‐Cambrian rocks are unconformably overlain by Ordovic

 

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