The Great Glen of Scotland is a series of glens running for about 100km between Inverness and Fort William in Scotland. It was formed by ice preferentially eroding the fractured rocks along the Great Glen Fault. The Great Glen Fault was initiated in the Silurian as a sinistral strike-slip fault in the collision between Baltica and Laurentia. Subsequent movement was dextral, most notably in the Carboniferous, but with later movement in the Cretaceous and Paleogene. There are still minor earthquakes on the fault system.

The geology map overlay is taken from OneGeology. The flashearth image is here.