Foinaven is a mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

 in Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

, situated in the far north-west corner of the Scottish Highlands

Scottish Highlands

The Highlands is an historic region of Scotland. The area is sometimes referred to as the "Scottish Highlands". It was culturally distinguishable from the Lowlands from the later Middle Ages into the modern period, when Lowland Scots replaced Scottish Gaelic throughout most of the Lowlands...

. Like many of the monolith

Monolith

A monolith is a geological feature such as a mountain, consisting of a single massive stone or rock, or a single piece of rock placed as, or within, a monument...

ic mountains that surround it, the mountain is within the Moine Thrust Belt

Moine Thrust Belt

The Moine Thrust Belt is a linear geological feature in the Scottish Highlands which runs from Loch Eriboll on the north coast 190 km south-west to the Sleat peninsula on the Isle of Skye...

 and is made up of imbricated layers of Cambrian

Cambrian

The Cambrian is the first geological period of the Paleozoic Era, lasting from Mya ; it is succeeded by the Ordovician. Its subdivisions, and indeed its base, are somewhat in flux. The period was established by Adam Sedgwick, who named it after Cambria, the Latin name for Wales, where Britain's...

 quartzite

Quartzite

Quartzite is a hard metamorphic rock which was originally sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to gray, though quartzites often occur in various shades of pink...

 which overlie the older Lewisian gneiss

Lewisian complex

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. These rocks are of Archaean and Paleoproterozoic age, ranging from 3.0–1.7 Ga. They form the basement on which the...

 basement. The quartzite, being tougher, stood firm when all the surrounding rock was eroded away, leaving the huge mountain isolated. Its highest point is named Ganu Mòr. Foinaven's smaller neighbour is Arkle

Arkle (hill)

Arkle is a mountain in Sutherland, situated in the far north-west corner of the Scottish Highlands. Like its sister Foinaven, the mountain is made up of glistening white Cambrian quartzite, laid down around 530 million years ago on an uneven basement of much older Lewisian gneiss...

. Foinaven was formerly thought, by some, to qualify as a Munro

Munro

A Munro is a mountain in Scotland with a height over . They are named after Sir Hugh Munro, 4th Baronet , who produced the first list of such hills, known as Munros Tables, in 1891. A Munro top is a summit over 3,000 ft which is not regarded as a separate mountain...

, but an accurate survey in 2007 confirmed that it falls twelve feet short of the required 3,000 ft http://thescotsman.scotsman.com/index.cfm?id=902022007