| Porth yr Ogof - Main Entrance (Cave / Sink)
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| Location | SN 92810 12410. Northern Outcrop - Central (Penwyllt to Penderyn), Powys | Updated |
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| Elevation (m) | 229 | Length (m) |
2220 | ||
| OS Map No. 1:50000 |
160 | 1:25000 |
OL12 | 1:10000 |
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| Access | The cave is a well known tourist spot and is marked on OS maps. From Ystradfellte, take the road towards Pont Nedd Fechan. After less than 800 metres, a single track road leads off on the left. The road descends to where a large car park is situated above the cave. | ||||
| Description | A large entrance, which takes the complete flow of the Mellte can be followed for 230 metres, but care is needed with the downstream sump as the current is strong. An extensive dry series leads off a chamber to the right of the entrance. The cave is visited daily by Adventure Groups. There are no less than 15 entrances / exits to the cave. NB. The resurgence is extremely dangerous and 10 people have drowned in the resurgence pool as of 2002. |
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| Bibliography | Lloyd, E. De Fossilium Marinorum E Foliorom Mineralium Origine, Published in Lithophylach Britannici Ichnographia (Oxford), 1970 Makin, B. The Scenery, antiquities and Biography of South Wales, 2ed, 1807 Anon. Cambrian Travellers Club, 1813 Young, W. Guide to the Beauties of Glynneath, (London), 1835 Roscoe, T. Wanderings in South Wales (London), 1836 Trans. Card. Nat. Soc. 3, 1872 Trans. Card. Nat. Soc. 20, (2), 128, 1888 Trans. Card. Nat. Soc. 21, (1), 40-41, 1889 SWCC Newsletter 19, 7-8, 1957 SWCC Newsletter 10, 1954. Flooding SWCC Newsletter 20, 1, 1957 R.Smith SWCC Newsletter 45, 20, 1963 J.Hartwell North, F.J. River Scenery at the Head of the Vale of Neath (Nat.Mus.Wales), 1ed, 1932 Caves and Caving 1, (3), 93-98, 1938. British Caver 4, 13-19, 1939. Extract from Glamorgan, 1938 British Caver 6, 44-53, 1940 YRC Journal 7, (23), 52-61, 1938. Early description HCC Newsletter 2, 2-3, 1951 HCC Newsletter 3, 6, 1952 Jenkins, D.W. & Williams, A.M. Caves of Wales and the Marches. Dalesman. 1st Ed.1963 Stratford, T. Caves of South Wales. 1995 Proceedings of UBSS Vol.12, No.2, 1970 Standing, P.A. and Lloyd, O.C. |
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| Survey | Caves and Caving 1, (3), 93-98, 1938. CRG 1959 UBSS 1968 |
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| Found / Dug By | Wessex CC 1937 | ||||
| Copyright © Cambrian Caving Council 2008 |
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