Rhisa an t-Sruith

(Reisa an t-Sruith, Rèisa an t-Sruith)

An uninhabited island in the Sound of Jura, Rhisa an t-Sruith (also Rèisa an t-Sruith) is located midway between the Aird of Kinuachdrachd in the northeast of Jura and Craignish Point on the mainland. Rising to 26m (85 feet) above sea level and extending to 12.6 ha (31.1 acres), the island is composed of ancient metamorphosed limestone crossed by later Tertiary dykes. The island is one of several hereabouts noted for its unusual but thriving population of water vole (Arvicola amphibius), thought to be descended from a pregnant female swept from the mainland.

There is a modern light beacon on its southwestern shore, built and maintained by the Northern Lighthouse Board.

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