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 Ty-Nant Pen Ty-Nant Pen Ty-Nant () is a hill within the Snowdonia National Park in Gwynedd, North Wales. Pen Ty-Nant is a member of the Arenig range, just from the small hamlet of Rhyd-uchaf and from Bala. Its parent peak Arenig Fawr is approximately to the west. It is a continuation of a small ridge that begins just to the northwest of Bala and ends at Moel y Garnedd on moorland known as the Gwastadros. On a clear day Pen yr Ole Wen, a member of the Carneddau can be seen above Llyn Celyn, to the northwest. Carnedd y Filiast, Moel