THE GEOLOGY OF THE OUTER HEBRIDES

The Hebridean Terrane

The Hebridean Terrane is the oldest of the five crystal blocks that form Scotland. This area includes the Outer Hebrides, some of the Inner Hebrides and the Western most part of Scotland (spanning from Skye up to Durness). As you can see from the image on the left, the parent rocks from Uist and Barra date back greater than 3,000 million years ago.

The Outer Hebrides are predominately formed from the Lewisian gneiss complex. Lewisian gneiss is a Precambrian metamorphic rock. Walking through the exhibition you will explore the geological processes that have shaped the Outer Hebrides that we recognise today.








To find out more about the geology of Scotland, please watch the Geology Of Scotland video.









To read more about the geology of the Outer Hebrides visit: https://webapps.bgs.ac.uk/Memoirs/docs/B01902.html

To read more about the Outer Hebrides faults and Pseudotachylyte visit: https://www.geolsoc.org.uk/GeositesOuterIslesFault