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Age and controls of ironstone deposition (Ordovician) North Wales

 

作者: R. J. B. Trythall,   C. Eccles,   S. G. Molyneux,   W. E. G. Taylor,  

 

期刊: Geological Journal  （WILEY Available online 1987）
卷期: Volume 22, issue S1  

页码: 31-43

 

ISSN:0072-1050

 

年代: 1987

 

DOI:10.1002/gj.3350220505

 

出版商: John Wiley&Sons Ltd

 

关键词: North Wales;Ironstones;Ordovician;Acritarchs;Llanvirn;Llandeilo;Caradoc

 

数据来源: WILEY

 

摘要:

AbstractPost‐Arenig ironstones and associated sediments of North Wales have yielded Upper Llanvirn, Llandeilo and Lower Caradoc acritarch assemblages. The occurrence of most ironstones coincides with a eustatic regression and subsequent transgression, and the emergence to the northwest of the Irish Sea Landmass, the probable source of the iron. The majority of ironstone deposition within the basin was restricted to short‐lived local submarine rises most likely produced by synsedimentary fault

 

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