Wales

Black Rock

Black Rock is a small islet located in the Severn Estuary, Wales. It has an area of 0.0009 km².

Typeriver island
Area0.0009 km²
Location51.31082, -2.99687
Water bodySevern Estuary (river)

Geology

Bedrock: Triassic Rocks (Undifferentiated) (Mudstone, Siltstone And Sandstone), Triassic–Triassic. Superficial deposits: Alluvium (Clay (Undifferentiated) And Silt (Undifferentiated) And Sand(Undifferentiated)). 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

Anglesey (Ynys Môn)
Bardsey Island
Caldey Island
Holy Island
Salt Island
Skokholm
Skomer
Barry Island

Last reviewed: 2026-08-13.