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  • ...ey from both the east and west. The contact of the Cwmyniscoy Mudstone and Abercriban Oolite formation in this area may influence the occurrence of springs and seepages. Diffuse
    10 KB (1,395 words) - 07:16, 5 April 2016
  • ...up of predominantly massive ooidal grainstones and thinly bedded dolomite (Abercriban Oolite Formation) overlies the Avon Group. To the east, as in the Clydach valley, dolomitise
    15 KB (2,153 words) - 09:53, 5 May 2016