Waun Lefrith
Encyclopedia
Waun Lefrith is a top of Picws Du
and is also the westernmost of the Carmarthen Fans or Bannau Sir Gaer, a group of peaks within the Black Mountain
of the Brecon Beacons National Park. It lies within the county of Carmarthenshire
. The summit plateau of the mountain reaches a height of 677m above sea level. Picws Du
is the other, higher summit of the Bannau Sir Gaer / Carmarthen Fans.
laid down during the Devonian period. Its southern slopes are formed from the hard-wearing sandstones of the overlying Plateau Beds Formation which are of upper/late Devonian age. The northern face of Waun Lefrith was home to a glacier during the ice ages which gouged out the cwm
in which Llyn y Fan Fach
now sits. This empties via the Afon Sawdde into the River Towy. The southern slopes drain via the Twrch Fechan, the Nant Menyn and Nant Lluestau into the Afon Twrch
and so into the River Tawe
.
to Abergavenny
runs over Waun Lefrith whilst the low level route runs along the foot of its northern escarpment.
Picws Du
Picws Du is the highest peak of the Carmarthen Fans or Bannau Sir Gaer in the Carmarthenshire section of the Black Mountain in the west of the Brecon Beacons National Park in south Wales. It is a subsidiary summit of Fan Brycheiniog....
and is also the westernmost of the Carmarthen Fans or Bannau Sir Gaer, a group of peaks within the Black Mountain
Black Mountain (range)
The Black Mountain is a mountain range in Mid and West Wales, straddling the county boundary between Carmarthenshire and Powys and forming the westernmost range of the Brecon Beacons National Park. Its highest point is Fan Brycheiniog at 802 metres or 2,631 ft. The Black Mountain also forms a part...
of the Brecon Beacons National Park. It lies within the county of Carmarthenshire
Carmarthenshire
Carmarthenshire is a unitary authority in the south west of Wales and one of thirteen historic counties. It is the 3rd largest in Wales. Its three largest towns are Llanelli, Carmarthen and Ammanford...
. The summit plateau of the mountain reaches a height of 677m above sea level. Picws Du
Picws Du
Picws Du is the highest peak of the Carmarthen Fans or Bannau Sir Gaer in the Carmarthenshire section of the Black Mountain in the west of the Brecon Beacons National Park in south Wales. It is a subsidiary summit of Fan Brycheiniog....
is the other, higher summit of the Bannau Sir Gaer / Carmarthen Fans.
Geology
Waun Lefrith is formed from the sandstones and mudstones of the Brownstones Formation of the Old Red SandstoneOld Red Sandstone
The Old Red Sandstone is a British rock formation of considerable importance to early paleontology. For convenience the short version of the term, 'ORS' is often used in literature on the subject.-Sedimentology:...
laid down during the Devonian period. Its southern slopes are formed from the hard-wearing sandstones of the overlying Plateau Beds Formation which are of upper/late Devonian age. The northern face of Waun Lefrith was home to a glacier during the ice ages which gouged out the cwm
Cwm
cwm may refer to* the geographical term for a rounded, glaciated valley also known as a corrie or cirque* the Welsh word for a valley, sometimes anglicized to Coombe* cwm , a general-purpose data processor for the semantic web...
in which Llyn y Fan Fach
Llyn y Fan Fach
Llyn y Fan Fach is a dammed lake in the eastern border of the Black Mountain in Carmarthenshire, south Wales. Near to it is found Llyn y Fan Fawr.-Legend of Llyn y Fan Fach:...
now sits. This empties via the Afon Sawdde into the River Towy. The southern slopes drain via the Twrch Fechan, the Nant Menyn and Nant Lluestau into the Afon Twrch
Afon Twrch
The Afon Twrch is a river which rises in the Black Mountain in south Wales. It forms the boundary between the counties of Powys and Carmarthenshire and, downstream of Ystradowen, between Powys and Neath Port Talbot county borough.The headwaters arise on the southern slopes of Bannau Sir Gaer and...
and so into the River Tawe
River Tawe
The River Tawe is a river in South Wales. It flows in a principally south-westerly direction for some from its source below Moel Feity in the Old Red Sandstone hills of the western Brecon Beacons to the Bristol Channel at Swansea. Its main tributaries are the right bank Upper and Lower Clydach...
.
Access
The entire mountain is open country and so freely accessible to walkers. The most popular path of ascent is that from the car park at the foot of the water board track running steeply up to Llyn y Fan Fach and over which lake the mountain looms. The high level route of the Beacons Way from LlangadogLlangadog
Llangadog is a community located in Carmarthenshire, Wales, which includes the villages of Llangadog, Bethlehem and Capel Gwynfe. A notable local landscape feature is Y Garn Goch with two Iron Age hill forts....
to Abergavenny
Abergavenny
Abergavenny , meaning Mouth of the River Gavenny, is a market town in Monmouthshire, Wales. It is located 15 miles west of Monmouth on the A40 and A465 roads, 6 miles from the English border. Originally the site of a Roman fort, Gobannium, it became a medieval walled town within the Welsh Marches...
runs over Waun Lefrith whilst the low level route runs along the foot of its northern escarpment.