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Staffa (Scottish Gaelic: Stafa, pronounced [ˈs̪t̪afa], from the Old Norse for stave or pillar island) is an island of the Inner Hebrides in Argyll and Bute, Scotland. The Vikings gave it this name as its columnar basalt reminded them of their houses, which were built from vertically placed tree-logs.
Staffa lies about 10 kilometres (6 miles) west of the Isle of Mull; its area is 33 hectares (82 acres) and the highest point is 42 metres (138 feet) above sea level.
The island came to prominence in the late 18th century after a visit by Sir Joseph Banks. He and his fellow-travellers extolled the natural beauty of the basalt columns in general and of the island's main sea cavern, which Banks renamed 'Fingal's Cave'. Their visit was followed by those of many other prominent personalities throughout the next two centuries, including Queen Victoria and Felix Mendelssohn. The latter's Hebrides Overture brought further fame to the island, which was by then uninhabited. It is now in the care of the National Trust for Scotland.
In prehistoric times (Pleistocene) Staffa was covered by the ice sheets which spread from Scotland out into the Atlantic Ocean beyond the Outer Hebrides. After the last retreat of the ice around 20,000 years ago, sea levels were up to 125 metres (410 ft) lower than at present. Although the isostatic rise of land makes estimating post-glacial coastlines a complex task, around 14,000 years ago it is likely that Staffa was part of a larger island, just off the coast of mainland Scotland, which would have included what are now Mull, Iona and the Treshnish Isles.