Northern Ireland

Castle Island

Castle Island — island in Northern Ireland. Map, location, and profile on Find My Island.

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Castle Island

Part of the Northern Ireland islands map.

Geology

Bedrock: Tyrone Group (Limestone, Mudstone, Sandstone And Siltstone, With Subordinate Chert, Coal And Conglomerate), Courceyan–Asbian. Contains British Geological Survey materials © UKRI 2026, licensed under the BGS Open Data Licence (OGL v3.0). Source: BGS DigMapGB-625 Bedrock & Superficial WMS.

Nearby and related islands

Sources

Last reviewed: 2026-08-13.