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Ordovician ignimbrites in the Berwyn Hills, north Wales

 

作者: P. J. Brenchley,  

 

期刊: Geological Journal  （WILEY Available online 1964）
卷期: Volume 4, issue 1  

页码: 43-54

 

ISSN:0072-1050

 

年代: 1964

 

DOI:10.1002/gj.3350040104

 

出版商: John Wiley&Sons Ltd

 

数据来源: WILEY

 

摘要:

AbstractTwo ignimbrite horizons are recognised in a Caradoc marine sequence. The uppermost, the Pandy Ash forms a single mappable unit, but is shown to consist of at least three separate flows, including both welded and non‐welded tuffs. Locally lahars occu

 

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