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Rhiwlas formation

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A correlation in cartoon form of upper Ordovician – lower Silurian strata f...
Published: 19 July 2013
to Cautleyan zone 1 and the possibility that the base Ashgill unconformity may descend into this interval is not represented. Sandstones: a – Cefn Formation; b – Powis Castle conglomerate; c – Garn Wen sandstone (Hirnantian); d – Glyn Formation. Limestones: e
Journal Article
Published: 01 May 1990
Journal of the Geological Society (1990) 147 (3): 537–547.
... Williams A. Strachan I. Bassett H. B. A Correlation of Ordovician rocks in the British Isles Geological Society, London, Special Report 1972 3 Wills L. J. A palaeogeological map of the Palaeozoic floor below the Permian and Mesozoic formations in England and Wales 1973 London...
Journal Article
Published: 01 November 2000
Journal of Paleontology (2000) 74 (6): 1148–1160.
... with an evolving composite standard that includes information from Ordovician strata at more than 100 localities in North America. Results indicate that the Hanson Creek Formation at Lone Mountain is latest Edenian through mid-Richmondian in age; that the Ordovician part of the Hanson Creek in the Monitor Range...
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Journal Article
Published: 27 March 2012
Geological Magazine (2012) 149 (6): 964–988.
... the Craigmalloch Formation (Albany Group) in the Girvan district of Scotland (Rushton, Tunnicliff & Tripp, 1996 ); a specimen of Microparia from the Laggan Member of the Balclatchie Formation at Girvan (Stewart & Owen, 2008 ) and six specimens, three complete, compared to Microparia...
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Journal Article
Published: 19 July 2013
Geological Magazine (2014) 151 (3): 447–471.
... to Cautleyan zone 1 and the possibility that the base Ashgill unconformity may descend into this interval is not represented. Sandstones: a – Cefn Formation; b – Powis Castle conglomerate; c – Garn Wen sandstone (Hirnantian); d – Glyn Formation. Limestones: e...
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Series: Geological Society, London, Special Publications
Published: 10 May 2023
DOI: 10.1144/SP532-2022-235
EISBN: 9781786209641
... to the SE are faulted against a weakly metamorphosed Cambrian clastic sequence to the NW: the Monian Supergroup in Anglesey and the Cahore Group and Cullenstown Formation in SE Ireland. The southeastern boundary to the Monian Terrane is the Menai Strait Fault System, a pre-Floian sinistral strike-slip zone...
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Series: Geological Society, London, Geology of Series
Published: 01 January 2006
DOI: 10.1144/GOEWP.3
EISBN: 9781862393882
...). They are interpreted as having been deep-neritic sediments of a low-energy input. The argillaceous limestones occur as local facies overlying Caradoc rocks. The best known is the Rhiwlas Limestone Member (Rawtheyan on Woolstonian) of the Moelfryn Mudstones Formation around Bala ( Bassett et al. 1966...
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