Cribyn (hill)
Encyclopedia
Cribyn is a mountain in the Brecon Beacons
Brecon Beacons
The Brecon Beacons is a mountain range in South Wales. In a narrow sense, the name refers to the range of popular peaks south of Brecon, including South Wales' highest mountain, Pen y Fan, and which together form the central section of the Brecon Beacons National Park...

 with an elevation of 795 metres.

The summit lies on a ridge stretching from Talybont Reservoir
Talybont Reservoir
The Talybont Reservoir is the largest stillwater reservoir in the central Brecon Beacons at .-References:*- External links :*...

 in the east, to the A470 road
A470 road
The A470 is a major long-distance connective spine road in Wales, running from Cardiff on the south coast to Llandudno on the north coast. It covers approximately 186 miles , over a zig-zagging route through the entirety of the country's mountainous central region, including the Brecon Beacons and...

. The ridge line to the west connects Cribyn with the peak of Pen y Fan
Pen y Fan
Pen y Fan is the highest peak in South Wales and southern Britain, situated in the Brecon Beacons National Park. At above sea-level, it is also the highest peak in Britain south of the Snowdonia mountain range...

. To the east, the ridge line descends to Bwlch ar y Fan, a col
Mountain pass
A mountain pass is a route through a mountain range or over a ridge. If following the lowest possible route, a pass is locally the highest point on that route...

 crossed by an ancient trail sometimes known as 'The Gap Road' before ascending again to the peak of Fan y Big
Fan y Big
Fan y Big is a subsidiary summit of Waun Rydd in the Brecon Beacons National Park, in southern Powys, Wales. At 719m, Fan y Big lies at the western tip of the Gwaun Cerrig Llwydion plateau...

.http://members.aol.com/walkingpages/corndu.htmhttp://books.google.co.uk/books?id=ROPTbj9als4C&pg=PA19&lpg=PA19&dq=fan+y+big+the+gap&source=web&ots=FUpLQfSmib&sig=XndaQqqTFH7dYopBTBgGSMaQtcM&hl=en

Cribyn on a clear day is a great summit to view the dramatic summits of the Beacons and the steep drops of the northern face of Pen y Fan. It is also a quieter summit and less likely to be crowded with hillwalkers
Hillwalking
In the British Isles, the terms hillwalking or fellwalking are commonly used to describe the recreational outdoor activity of walking on hills and mountains, often with the intention of visiting their summits...

.

Geology

In common with other peaks of the Brecon Beacons, the upper slopes of Cribyn are formed from sandstones of the Brownstones Formation of the Old Red Sandstone
Old 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. The lower slopes of the hill are formed from sandstones and mudstones of the underlying Senni Beds Formation. The rock strata tilt gently southwards.
The heads of Cwm Sere and Cwm Cynwyn, to the northwest and east of Cribyn respectively, nurtured small glaciers during the last ice age. This glacial erosion resulted in the very steep northern and eastern faces which the hill possesses.

External links

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