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Being relatively resistant to erosion, the
Pennant Sandstones form the plateau surface of the Coalfield into which the coalfield valleys have been deeply incised by water and ice. They reach their greatest height (though not their highest stratigraphic level) at the flat summit of
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Waters, C N, Barclay, W J, Davies, J R and Waters, R A. In press. Stratigraphical framework for
Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report,
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Pennant Stone: Hard, fine grained, blue/grey coloured sandstone. Quarried in South Wales and the
Bristol area and commonly used, throughout the country, as a stone roofing material (stone slate).
54:. The Pennant Measures were divided into the Lower Pennant Measures and the Upper Pennant Measures, differing from the underlying Middle and Lower Coal Measures in being principally of sandstone
89:. The Pennant Sandstone Formation is now formally subdivided (in ascending order) into the Llynfi, Rhondda, Brithdir, Hughes and Swansea members, each of which units formerly had 'bed' status.
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81:. The formation is recognised to be of Bolsovian to 'Westphalian D' age. It overlies the uppermost strata of the newly defined
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The sandstone were quarried both in South Wales and the
Bristol area for use in paving and roofing is also known as
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occur within the
Pennant Measures though they are less common than in the underlying Coal Measures.
47:
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British
Geological Survey 1:50,000 map sheet 231 'Merthyr Tydfil' & accompanying memoir.
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However recent reclassification of the sequence has resulted in the definition by the
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National
Monuments Record Main Building Materials Thesaurus
62:– with mudstone being the subsidiary rock type. Numerous
107:, constructed largely of grey Pennant Sandstone with
97:where they are represented by the Hughes Member.
8:
34:is the traditional name for a sequence of
85:and underlies the rocks of the succeeding
42:. They were also referred to as the Upper
257:Geologic formations of the United Kingdom
128:
77:as a sub-unit of the newly established
27:Geological term for rock in south Wales
50:'C' and Westphalian 'D' stages of the
7:
262:Stratigraphy of the United Kingdom
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111:around the door and window frames
145:BGS Lexicon of Named rock units
83:South Wales Coal Measures Group
252:Carboniferous System of Europe
1:
58:– known collectively as the
169:. British Geological Survey
167:"Geology of Britain Viewer"
75:Pennant Sandstone Formation
278:
105:St Paul's Church, Bristol
71:British Geological Survey
112:
103:
40:South Wales Coalfield
232:Sandstone formations
203:on 13 September 2011
52:Carboniferous Period
46:and assigned to the
247:Carboniferous Wales
87:Grovesend Formation
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79:Warwickshire Group
60:Pennant Sandstone
16:(Redirected from
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242:Geology of Wales
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199:. Archived from
197:English Heritage
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32:Pennant Measures
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189:"Pennant Stone"
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237:Coal in Wales
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117:Pennant Stone
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44:Coal Measures
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38:rocks of the
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18:Pennant stone
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205:. Retrieved
201:the original
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171:. Retrieved
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95:Craig y Llyn
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48:Westphalian
36:sedimentary
226:Categories
123:References
109:Bath stone
64:coal seams
156:RR/05/06.
173:16 April
73:of the
207:3 July
56:units
209:2011
175:2022
30:The
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20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
