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  • ...estone aquifers, the Clwyd Limestone Group in north Wales and the Pembroke Limestone Group in south Wales are used for public and private supply. A number of in ...es in base level (see box below: Development of Karst in the Carboniferous Limestone).
    29 KB (4,524 words) - 09:33, 18 February 2016
  • ...In south Wales this translates into the lowermost Avon Group, the Pembroke Limestone Group, the Marros Group (of Millstone Grit facies), followed by the South W
    4 KB (624 words) - 09:32, 18 February 2016
  • ...lay, limestone, building stone and water. Hematite has been mined from the limestone of the Lake District, lead, zinc and fluorspar from Derbyshire and elsewher ...an and Stephanian. These equate broadly with the older terms Carboniferous Limestone (Tournaisian/Visean), Millstone Grit (Namurian) and Coal Measures (Westphal
    19 KB (2,854 words) - 17:07, 28 July 2015
  • ...col" style="width: 400px;" | Carboniferous Limestone — Dowlais Limestone Formation | Carboniferous Limestone — Dowlais Limestone Formation
    3 KB (385 words) - 08:16, 5 April 2016
  • ...estone within a clay matrix. Groundwater discharges from the Carboniferous Limestone aquifer via discrete springs and large seepage areas occur across the easte
    16 KB (2,132 words) - 08:16, 5 April 2016
  • [[File:P662425.jpg|thumbnail|High Tor Limestone Formation dipping south, Three Cliffs Bay, Gower (MFH P662425). ]] ...36.jpg|thumbnail|Palaeokarstic surface at the top of the Dinantian Dowlais Limestone overlain unconformably by pebbly grit at the base of the Namurian; the grit
    23 KB (3,358 words) - 10:53, 5 May 2016