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
Namadgi National Park of Canberra's water. In this sub-alpine region the weather ranges from cold winter nights to warm summer days, and it can change very quickly. Snow normally falls on the Bimberi and Brindabella Ranges during winter, and is not uncommon throughout most of the park. The highest mountain is Bimberi Peak at which is the highest peak in the Australian Capital Territory. The national park is classified as an IUCN Category II protected area. "Namadgi" is a local Aboriginal name for the mountains situated to the southwest of Canberra. Aboriginal presence in the area has been dated to at least 21,000