Age and controls of ironstone deposition (Ordovician) North Wales

Autor:	S. G. Molyneux, W. E. G. Taylor, C. Eccles, R. J. B. Trythall
Rok vydání:	1987
Předmět:	Paleontology Ironstone Paleozoic Ordovician engineering Acritarch Geology Sedimentary rock engineering.material Biostratigraphy Gossan Marine transgression
Zdroj:	Geological Journal. 22:31-43
ISSN:	1099-1034 0072-1050
DOI:	10.1002/gj.3350220505
Popis:	Post-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 faulting.
Databáze:	OpenAIRE
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