UK: Assyntite
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Fact sheet
Description: 

This sodalite bearing syenite (known locally as Assyntite) sample comes from East of Ledbeg, Sutherland, Scotland, and is part of the Borralan intrusion which lies in the SW corner of the Assynt region bordered by the Moine Thrust zone. This intrusive complex is the only plutonic complex composed largely of silica-undersaturated (i.e. feldspathoid-bearing) igneous rocks in the British Isles. Several members of the Borralan suite of intrusion are exceptionally alkaline. It provides Britain's only example of truly ultra-potassic magmatism.

In Place
In Time
Location description: 
East of Ledbeg, Assynt Region, Sutherland, Scotland
Accuracy:
Timescale:
Not known
Ma = Millions of years ago
In Focus
Collection:
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Type:
Type: 
igneous
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