The dramatic ‘Small Isles’ of Canna, Eigg, Muck and Rum have a fiery past that tell of a time when active volcanoes dominated the north-west coast of Scotland.
The Small Isles in the far west of Lochaber are home to a fascinating variety of rocks, ranging from the 3-billion year old Lewisian Gneiss, to the remains of volcanoes which erupted around 60 million years ago. Canna, Eigg and Muck are made up almost exclusively of volcanic rocks, while Rum is the eroded remains of a magma chamber beneath a great volcano
Geology and Rum
Rum is a geosite of international importance and fame. For a detailed look into the geology, check out our Isle of Rum layered intrusion page.
The islands can be reached by ferry from Mallaig all year and from Arisaig during the summer, to find ferry links check out our arrival page. The stopping points on the geotrail help to explain the forces that have created the distinct features of the Small Isles.
To purchase a pack of geotrail leaflets, visit our shop page.