Crug Hywel

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Crug Hywel
Crug Hywel Hill Fort, Near Abergavenny.jpg
Crug Hywel, or Table Mountain, Black Mountains
Elevation 451 m (1,480 ft)
Prominence < 10 m
Translation Hywel's mound (Welsh)
Pronunciation Welsh: [ˈkriːɡ ˈhɐwɛl]
Location Black Mountains, Wales
OS grid SO225207

Crug Hywel (called the Table Mountain in English) is a flat-topped hill at the southern edge of the Black Mountains in south-east Wales. It rises to 451 m above sea level, from the southern flank of Pen Cerrig-calch (701 m), and overlooks the town of Crickhowell,[1] to which it gives its name.

The summit of the hill is entirely taken up by an Iron Age hill fort,[2] with a clearly visible earth and stone ditch and rampart.[3][4] The hill is approached by a couple of public footpaths across farmland from Crickhowell and Llanbedr and visited by the Beacons Way. It lies within an area designated as open country over which the public have the right to roam.


Crug Hywel

The hill is formed from Old Red Sandstone originating in the Devonian period, specifically the sandstones of the Brownstones Formation, topped by rocks of the Quartz Conglomerate Group. The whole mass of rocks forming this outlier of Pen Cerrig-calch can readily be seen to dip more sharply to the south than nearby strata and is considered to be an excellent example of a translational slide.[5]

See also[edit]


  1. ^ "Bridge over River Usk at Crickhowell:: OS grid SO2118 :: Geograph Britain and Ireland". Retrieved 2012-08-20. 
  2. ^ "Crug Hywel / Table Mountain:: OS grid SO2220 :: Geograph Britain and Ireland". Retrieved 2012-08-20. 
  3. ^ "Crug Hywel:: OS grid SO2220 :: Geograph Britain and Ireland". 2007-03-18. Retrieved 2012-08-20. 
  4. ^ "Table Mountain:: OS grid SO2220 :: Geograph Britain and Ireland". Retrieved 2012-08-20. 
  5. ^ Barclay, W.J. & Wilby, P.R. 2003,Geology of the Talgarth district, BGS 1:50K map geological sheet explanation

External links[edit]

Coordinates: 51°52′46″N 3°07′38″W / 51.87946°N 3.12727°W / 51.87946; -3.12727