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Lying on the northwestern fringes of Scotland, the Outer Hebridean islands are a windswept but beautiful group of low-lying islands. Geologically, they are almost 3 billion years old, but it is their geomorphological interest that makes them a classic site. Lying so far from the mainland, they have helped to determine the extent of the last Scottish ice sheet and have been the subject of study by many glaciologists including James Geikie.

The islands stretch for almost 200km along a NNE-SSW trend and exhibit many features of glaciation. The ice sheet was considered to have travelled from the Scottish Highlands out over the islands.

Loch Druidibeg – this loch and its associated catchment and coastline is part of the largest Machair system in the British isles. Providing one of the best examples in the Western Isles of a complete transition of habitats from the western coastal machair system to inland moorland and blanket bog. © Scottish Natural Heritage.