Pen y Fan same noun "ban", in its plural form "bannau", is found in the Welsh name for the Brecon Beacons: "Bannau Brycheiniog". There is no one standard translation of "Pen y Fan", but 'the mountain's peak' or 'the beacon's summit' are both possible translations. Pen y Fan is formed from various units of the Old Red Sandstone which were laid down during the Devonian period. The lower slopes of the mountain are formed from the sandstones and mudstones of the Senni Formation whilst the upper slopes are formed from those of the Brownstones Formation. The very summit, like that of neighbouring Corn
Pen-y-Mount Junction railway station the Welsh Highland Railway and took possession of the line from Traeth Mawr to Pen-y-Mount and, since 2009, WHHR trains have terminated at Pen-y-Mount. It is hoped that in future the WHHR will have running rights over the FR-owned WHR mainline and that the station will become an interchange between the two railways. The two companies, however, are still in discussion over these issues and have yet to reach an agreement. It is intended that Pen-y-Mount Junction will have three platforms, with lines to Beddgelert and both Porthmadog Termini. Pen-y-Mount Junction railway station Pen-y-Mount Junction station is the northern terminus