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Foel Fraith
''not to be confused with Fan Fraith a few miles further east in the Fforest Fawr range''
Foel Fraith is a hill in the Black Mountain in the county of Carmarthenshire, southwest Wales. It lies within the Brecon Beacons National Park and Fforest Fawr Geopark. Its plateau-like summit attains a height of above sea level. To the north the subsidiary summit of Cefn y Cylchau reaches , and to the southeast is the subsidiary summit of Carn Fadog or Cefn Carn Fadog, which reaches a height of .〔Ordnance Survey Explorer map OL12 'Brecon Beacons National Park: western area'〕
==Geology==
The hill has a split personality with its northern slopes dominated by the succession of Carboniferous Limestone rocks and its southern slopes by the Twrch Sandstone (formerly known as the 'Basal Grit') of the overlying Marros Group, but also dating from the Carboniferous period. In common with the regional trend the rock strata dip moderately to the south though locally the beds overlying the limestone have foundered as this soluble rock has dissolved away over millennia. There is an extensive area of shakeholes across the entire hill. Carn Fadog is similar in character. Its summit plateau conceals three small bodies of water. On its flanks are numerous quarries both for limestone and for gritstone.〔British Geological Survey 1:50,000 map sheet 230 'Ammanford'〕
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