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The Pembrokeshire Coalfield in West Wales is one of the smallest British coalfields. The main coalfield extends from Saundersfoot on Carmarthen Bay westwards to Broad Haven on St Brides Bay. A small detached portion of the field is centred on Newgale on St Brides Bay.〔British Geological Survey 2009 ''Bedrock geology: UK South'' BGS, Keyworth, Nottingham〕 The coalfield is in effect the westernmost extension of the South Wales Coalfield though it is separated from the main body of that field by Carmarthen. Coal seams within the Pembrokeshire Coalfield are traditionally referred to as veins. The following sequence is recognised in the west of the district:〔Connop-Price, M.R., 2004 ''Pembrokeshire: the Forgotten Coalfield'', Landmark Publishing, Ashbourne , England〕 The Stonepit and Quarry Veins are collectively referred to as the Sibbernock Veins. The sequence from the Three Quarter to the Foot Vein constitutes the Newgale, Simpson and Eweston Coals. In contrast in the centre and east of the district, there are fewer veins in what is a more compressed sequence: * Rock Vein * Timber Vein * Lower Level Vein * Kilgetty Vein * Tan Pits Vein ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pembrokeshire Coalfield」の詳細全文を読む スポンサード リンク
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