Geological Map

Glacial Sediments Peel sandstone Viking crosses at Maughold Laxey Mine Manx Group Peel Castle quarry Dalby Group Marine Drive Cass-ny-Hawin Castletown limestone Algal Mound The Chasms Scarlett Volcanics

• Glacial sediments
• Scarlett volcanics
• Castletown limestone
• Langness conglomerate
• Peel sandstone
• Granite
• Poortown gabbro
• Dalby Group

Folds and faults Mineralisation Tertiary dykes

This is a representation of the rock types that occur at or near the surface on the Isle of Man. Most of the rocks are in fact covered by a thin layer of soil so that the map is an interpretation – the geology is extrapolated from areas where the rocks are exposed such as at the coast or in quarries. A large part of the Island is composed of a suite of rocks collectively known as the Manx Group. These were originally sediments deposited on the sea bed 490-470 million years ago.

See also

• Rock types within the Manx Group
• 3D view of the Isle of Man
• Manx Group Fossils
• Lamplugh’s Geology