Ardnamurchan in the context of Pluton

In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New Jersey; the Henry Mountains of Utah; the Bushveld Igneous Complex of South Africa; Shiprock in New Mexico; the Ardnamurchan intrusion in Scotland; and the Sierra Nevada Batholith of California.

Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained (phaneritic). Intrusive igneous rocks are classified separately from extrusive igneous rocks, generally on the basis of their mineral content. The relative amounts of quartz, alkali feldspar, plagioclase, and feldspathoid is particularly important in classifying intrusive igneous rocks.

Corrachadh Mòr is a headland on the Ardnamurchan Peninsula in Lochaber, Highland, west of Scotland. Notable for being the most westerly point on the island of Great Britain, it is 37 km (23 mi) further west than Land's End in Cornwall.

Depending on which coordinates are used, this headland is 31 or 43 metres (102 or 141 ft) west of Ardnamurchan Point (and about a kilometre to its south).

Lord of the Isles or King of the Isles (Scottish Gaelic: Triath nan Eilean or Rìgh Innse Gall; Latin: Dominus Insularum) is a title of nobility in the Baronage of Scotland with historical roots that go back beyond the Kingdom of Scotland. It began with Somerled in the 12th century and thereafter the title was held by a series of his descendants, the Norse-Gaelic rulers of the Isle of Man and Argyll and the islands of Scotland in the Middle Ages. They wielded sea-power with fleets of galleys (birlinns). Although they were, at times, nominal vassals of the kings of Norway, Ireland, or Scotland, the island chiefs remained functionally independent for many centuries. Their territory included much of Argyll, the Isles of Arran, Bute, Islay, the Isle of Man, Hebrides (Skye and Ross from 1438), Knoydart, Ardnamurchan, and the Kintyre peninsula. At their height they were the greatest landowners and most powerful lords after the kings of England and Scotland.

The end of the MacDonald Lords came in 1493 when John MacDonald II had his ancestral homeland, estates, and titles seized by King James IV of Scotland. After that time, the MacDonald Clan contested the right of James IV to the Lordship of the Isles and uprisings and rebellions against the Scottish monarch were common. More recently, the Lordship of the Isles has been held by the Duke of Rothesay, the eldest son and heir apparent of the King of Scots, a title which, since the creation of the Kingdom of Great Britain, is usually borne by the Prince of Wales. Thus Prince William is the current Lord of the Isles.

The Small Isles (Scottish Gaelic: Na h-Eileanan Tarsainn) are a small archipelago in the Inner Hebrides, off the west coast of Scotland. They lie south of Skye and north of Mull and Ardnamurchan; the most westerly point of mainland Scotland.

Until 1891, Canna, Rùm and Muck belonged to the county of Argyll, while Eigg belonged to Inverness-shire. In that year, the entire archipelago was transferred to Inverness-shire. They now belong to the Highland council area.