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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).
43:. 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
78:. 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.
75:
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70:. 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
71:
220:
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occur within the
Pennant Measures though they are less common than in the underlying Coal Measures.
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28:
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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
51:– with mudstone being the subsidiary rock type. Numerous
96:, constructed largely of grey Pennant Sandstone with
86:where they are represented by the Hughes Member.
212:
23:is the traditional name for a sequence of
74:and underlies the rocks of the succeeding
31:. They were also referred to as the Upper
246:Geologic formations of the United Kingdom
88:
66:as a sub-unit of the newly established
16:Geological term for rock in south Wales
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39:'C' and Westphalian 'D' stages of the
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251:Stratigraphy of the United Kingdom
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100:around the door and window frames
134:BGS Lexicon of Named rock units
72:South Wales Coal Measures Group
241:Carboniferous System of Europe
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1:
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47:– known collectively as the
7:
158:. British Geological Survey
156:"Geology of Britain Viewer"
64:Pennant Sandstone Formation
10:
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94:St Paul's Church, Bristol
60:British Geological Survey
101:
92:
29:South Wales Coalfield
221:Sandstone formations
192:on 13 September 2011
41:Carboniferous Period
35:and assigned to the
236:Carboniferous Wales
76:Grovesend Formation
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68:Warwickshire Group
49:Pennant Sandstone
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231:Geology of Wales
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188:. Archived from
186:English Heritage
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21:Pennant Measures
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178:"Pennant Stone"
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226:Coal in Wales
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106:Pennant Stone
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33:Coal Measures
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27:rocks of the
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194:. Retrieved
190:the original
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160:. Retrieved
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84:Craig y Llyn
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37:Westphalian
25:sedimentary
215:Categories
112:References
98:Bath stone
53:coal seams
145:RR/05/06.
162:16 April
62:of the
196:3 July
45:units
198:2011
164:2022
19:The
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