Arkle () is a

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited Summit (topography), summit area, and ...

Sutherland Sutherland ( gd, Cataibh) is a historic county, registration county and lieutenancy area in the Highlands of Scotland. Its county town is Dornoch. Sutherland borders Caithness and Moray Firth to the east, Ross-shire and Cromartyshire (later ...

, in the far north-west corner of the

Scottish Highlands The Highlands ( sco, the Hielands; gd, a’ Ghàidhealtachd , 'the place of the Gaels') is a historical region of Scotland. Culturally, the Highlands and the Lowlands diverged from the Late Middle Ages into the modern period, when Lowland Sco ...

. Like its sister

Foinaven – , photo = Foinaven_from_Achriesgill.jpg , photo_caption = Foinaven seen from Achriesgill on Loch Inchard , elevation_m = 911 , elevation_ref = , prominence_m = 690 , prominence_ref = , parent_peak = Ben Klibreck , listing = Mari ...

, the mountain is made up of glistening white

Cambrian The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...

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 ...

, laid down around 530 million years ago on an uneven basement of much older

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 ...

. The quartzite, and the

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 makes up many of the other mountains in the area, have been dissected by rivers and glaciers, leaving a series of isolated peaks, such as Suilven,

Quinag , photo = Quinag.jpg , photo_caption = Quinag in the distance from the western end of Loch Assynt , elevation = Sàil Gharbh: 808 m (2,651 ft)Sàil Ghorm: 776 m (2,546 ft)Spidean Coinich: 764 m (2,506 ft) , prominence = ''c.'' 553 m, 158 m, 19 ...

and

Stac Pollaidh Stac Pollaidh (IPA: �s̪t̪ʰaʰkˈpʰɔɫ̪ais a mountain in the Northwest Highlands of Scotland. The peak displays a rocky crest of Torridonian sandstone, with many pinnacles and steep gullies. The ridge was exposed to weathering as a nunatak ...

, standing above the "knock and lochan" landscape of small hills and lakes that is typical of the Lewisian gneiss. 'Ben Arkle' was the subject of a painting by Charles, Prince of Wales. This painting was reproduced by the British Post Office as one of a set of five stamps (SG 1810–1814, issued 1 March 1994) showing paintings by Prince Charles and also, as a commemorative label, in a stamp book (SG HB16) issued 14 November 1994 to celebrate the Prince's 50th birthday. Arkle, the Irish

thoroughbred The Thoroughbred is a horse breed best known for its use in horse racing. Although the word ''thoroughbred'' is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed. Thoroughbreds are c ...

racehorse, was named after the mountain.

References

Marilyns of Scotland Corbetts Mountains and hills of the Northwest Highlands {{Highland-geo-stub