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Liathach (pronounced , ) is a mountain in the
Torridon Hills The Torridon Hills surround Torridon village in the Northwest Highlands of Scotland. The name is usually applied to the mountains to the north of Glen Torridon. They are among the most dramatic and spectacular peaks in the British Isles and made ...
, in the
Northwest Highlands The Northwest Highlands are located in the northern third of Scotland that is separated from the Grampian Mountains by the Great Glen (Glen More). The region comprises Wester Ross, Assynt, Sutherland and part of Caithness. The Caledonian Canal, ...
of
Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...
. It stands between
Loch Torridon Loch Torridon ( gd, Loch Thoirbheartan) is a sea loch on the west coast of Scotland in the Northwest Highlands. The loch was created by glacial processes and is in total around 15 miles (25 km) long. It has two sections: Upper Loch Torridon ...
and the neighbouring mountain
Beinn Eighe Beinn Eighe () is a mountain massif in the Torridon area of Wester Ross in the Northwest Highlands of Scotland. Lying south of Loch Maree, it forms a long ridge with many spurs and summits, two of which are classified as Munros: Rua ...
. The mountain is a ridge running east–west, with several peaks, and its upper half is made up of many steep rocky terraces. The highest peak is the
Munro A Munro () is defined as a mountain in Scotland with a height over , and which is on the Scottish Mountaineering Club (SMC) official list of Munros; there is no explicit topographical prominence requirement. The best known Munro is Ben Nevis ...
of Spidean a' Choire Lèith ('peak of the grey corrie') at high. The other Munro peak is Mullach an Rathain at high.


Geology

The mountain is composed of
Torridonian sandstone In geology, the term Torridonian is the informal name for the Torridonian Group, a series of Mesoproterozoic to Neoproterozoic arenaceous and argillaceous sedimentary rocks, which occur extensively in the Northwest Highlands of Scotland. The st ...
which forms massive near-horizontal
strata In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...
. They form the numerous terraces that are obvious from afar. The rocks are mainly red and chocolate
sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) ...
s,
arkose Arkose () or arkosic sandstone is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. Arkosic sand is sand that is similarly rich in feldspar, and thus the potential precursor of arkose. Quartz is c ...
s,
flagstone Flagstone (flag) is a generic flat stone, sometimes cut in regular rectangular or square shape and usually used for paving slabs or walkways, patios, flooring, fences and roofing. It may be used for memorials, headstones, facades and other con ...
s and
shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especial ...
s with coarse
conglomerate Conglomerate or conglomeration may refer to: * Conglomerate (company) * Conglomerate (geology) * Conglomerate (mathematics) In popular culture: * The Conglomerate (American group), a production crew and musical group founded by Busta Rhymes ** Co ...
s locally at the base. Some of the materials of these rocks were derived from the underlying
Lewisian gneiss The Lewisian complex or Lewisian gneiss is a suite of Precambrian metamorphic rocks that outcrop in the northwestern part of Scotland, forming part of the Hebridean Terrane and the North Atlantic Craton. These rocks are of Archaean and Paleoprote ...
, 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 Denudation is the geological processes in which moving water, ice, wind, and waves erode the Earth's surface, leading to a reduction in elevation and in relief of landforms and landscapes. Although the terms erosion and denudation are used interch ...
land surface the Torridonian strata rest horizontally or with gentle
inclination Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a Plane of reference, reference plane and the orbital plane or Axis of rotation, axis of direction of the orbiting object ...
. Some of the peaks, such as
Beinn Eighe Beinn Eighe () is a mountain massif in the Torridon area of Wester Ross in the Northwest Highlands of Scotland. Lying south of Loch Maree, it forms a long ridge with many spurs and summits, two of which are classified as Munros: Rua ...
, are capped with white
quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tect ...
, giving them a distinctive appearance when seen from afar. Some of the quartzite contains
fossilized A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
worm burrows and is known as ''pipe rock''. It is about 500 million years old. The Torridon
landscape A landscape is the visible features of an area of land, its landforms, and how they integrate with natural or man-made features, often considered in terms of their aesthetic appeal.''New Oxford American Dictionary''. A landscape includes the ...
is itself highly
denuded Denudation is the geological processes in which moving water, ice, wind, and waves erode the Earth's surface, leading to a reduction in elevation and in relief of landforms and landscapes. Although the terms erosion and denudation are used interch ...
by
glacial A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate betw ...
and
alluvial Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluv ...
action, and represents the remnants of an ancient
peneplain 390px, Sketch of a hypothetical peneplain formation after an orogeny. In geomorphology and geology, a peneplain is a low-relief plain formed by protracted erosion. This is the definition in the broadest of terms, albeit with frequency the usage ...
.


Climbing

Liathach has four listed "Tops" in the Munro Tables, Meall Dearg at 3133 feet (955 m) 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 50m to gain the ridge.
Irvine Butterfield Irvine Butterfield (1936–2009) was an environmentalist, hillwalker and author of several books about mountains and the outdoor environment who took a significant role in the running of organisations with such interests in Scotland. He was a go ...
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 Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is distin ...
at points where it crosses any of a series of
gullies A gully is a landform created by running water, mass movement, or commonly a combination of both eroding sharply into soil or other relatively erodible material, typically on a hillside or in river floodplains or terraces. Gullies resemble lar ...
. In winter the traverse of Liathach becomes an even more serious expedition.


In popular culture

Scottish singer Jo Hamilton named a song after Liathach on her debut album Gown. The song was subsequently covered by
Prince A prince is a male ruler (ranked below a king, grand prince, and grand duke) or a male member of a monarch's or former monarch's family. ''Prince'' is also a title of nobility (often highest), often hereditary, in some European states. Th ...
on his 2013 Live Out Loud tour.


References

* ''The Munros and Tops'', Chris Townsend, * ''The High Mountains of Britain and Ireland'',
Irvine Butterfield Irvine Butterfield (1936–2009) was an environmentalist, hillwalker and author of several books about mountains and the outdoor environment who took a significant role in the running of organisations with such interests in Scotland. He was a go ...
, Footnotes


External links

* Liathach is at coordinates {{Scottish Munros section 13 Munros Marilyns of Scotland Mountains and hills of the Northwest Highlands Torridon Climbing areas of Scotland One-thousanders of the British Isles