Geology.

A geological map of Islay, Jura and Colonsay

A geological map of Islay, Jura and Colonsay

Rhinns Complex gneiss at Lossit Bay

Rhinns Complex gneiss at Lossit Bay

Folded metagreywackes of the Colonsay Group near Saligo Bay

Folded metagreywackes of the Colonsay Group near Saligo Bay

The Port Askaig Tillite on the Sound of Islay

The Port Askaig Tillite on the Sound of Islay

The 'Billion-Year Gap' at Kilchiaran Bay

The 'Billion-Year Gap' at Kilchiaran Bay

Stromatolites in the Bonahaven Dolomite near Bolsa

Stromatolites in the Bonahaven Dolomite near Bolsa

Cenozoic dolorite dyke near Rhuvaal

Cenozoic dolorite dyke near Rhuvaal