- pronounced )
Geology
The mountain is composed of Torridonian sandstone which forms massive near-horizontal
stratum. They form the numerous terraces that are obvious from afar. The rocks are mainly red and chocolate
,
,
and
with coarse conglomerates locally at the base. Some of the materials of these rocks were derived from the underlying
Lewisian complex, upon the uneven surface of which they rest, but the bulk of the material was obtained from rocks that are nowhere now exposed. Upon this ancient
denuded land surface the Torridonian strata rest horizontally or with gentle
inclination. Some of the peaks, such as
Beinn Eighe, are capped with white
quartzite, giving them a distinctive appearance when seen from afar. Some of the quartzite contains
fossilized worm burrows and is known as
pipe rock. It is about 500 million years old. The Torridon
landscape is itself highly
denuded by
glacial and
alluvial action, and represents the remnants of an ancient
peneplain.
Climbing
Liathach has four listed "Tops" in the Munro Tables, Meall Dearg at stands off the main ridge at the end of the Northern Pinnacles which run north from Mullach an Rathain. The route along the Northern Pinnacles is considered a rock climb, although another route to the top from Coire na Caime only involves a short steep scramble on the final 50 m to gain the ridge. Irvine Butterfield considers Meall Dearg "The most difficult top in the British Isles challenged only by the Inaccessible Pinnacle of Sgùrr Dearg".
["The Munros and Tops" Page 174 Gives details of Meall Dearg.]["The High Mountains of Britain and Ireland" Page 223 Gives quote from Butterfield and route from Coire na Caime.] The Northern Pinnacles were first climbed in 1894 by Hinxman, Rennie and Douglas.
Climbing the mountain including both of the above peaks is a challenging expedition; the intervening ridge is for the most part a series of rocky pinnacles known as Am Fasarinen ( The Teeth), which reaches a height of 927 metres at the western end and is considered a Munro "top". There are few places on the ridge for descent, so once committed, the walker has little choice but to complete the entire ridge walk. The pinnacles can however be avoided by means of a narrow path that traverses the ridge on the south side. The path is very exposed, and there is much erosion at points where it crosses any of a series of gully. In winter the traverse of Liathach becomes an even more serious expedition.
-
The Munros and Tops, Chris Townsend,
-
The High Mountains of Britain and Ireland, Irvine Butterfield,
Footnotes
External links
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Liathach is at coordinates
