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From Wikipedia, the free encyclopedia

The Afon Crawnon is a river in the Brecon Beacons National Park in the county of Powys, south Wales. The headwaters rise on the hills north of Trefil and flow northeast down a valley known as Dyffryn Crawnon for 7km to a confluence with the River Usk just west of Llangynidr. [1] The valley is notable for being at the centre of a major green energy initiative known as The Three Green Valleys project and which involves the construction of several micro-hydro schemes.

Geology

The river flows through a valley carved into the mudstones and sandstones of the Old Red Sandstone laid down during the Devonian period. [2]

Access

The public road up the valley is effectively a cul-de-sac though numerous footpaths and bridleways climb up the sides of the valley from it. The Beacons Way skirts the northern edge of Dyffryn Crawnon.

References

  1. ^ Ordnance Survey Explorer maps OL12 & OL13 'Brecon Beacons National Park: western area & eastern area'
  2. ^ British Geological Survey 1:50,000 map sheet 232 'Abergavenny' & accompanying memoir

Coordinates: 51°52′08″N 3°14′39″W / 51.86889°N 3.24417°W / 51.86889; -3.24417


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