Each of these areas has a very different geological history. Coll is one of the islands composed of Lewisian gneiss. North-western Mull consists of basalt lava-flows from the vents in the central ...

The Grimsel area is a landscape of ancient stone and primeval forces. This pass has always been used to cross from North to South or vice-versa. It also constitutes the watershed between the North Sea ...

Luisa Hendry Luisa has turned what started out as a childhood interest in rocks into a career Scotland's rich geology includes Lewisian Gneiss. At about three billion years old they are Scotland's ...

There are all the big names you’d expect – ruby, coal, moon rock – and many more that are unfamiliar: Haüyne, Lewisian gneiss, phonolite porphyry. Whenever Judah looks like heading into obvious ...

This was heavy rock music – the rock in question being sarsen, Lewisian Gneiss and bluestone, quarried and erected to form henges, dolmens and menhirs by the megalithic people of the British Isles.