sinistral (left-lateral), the same as the closely related set of faults sub-parallel to the main part of the Great Glen Fault, which include the Strathconon and Strathglass faults to the northwest and the Laggan, Tyndrum and Ericht-Laidon faults to the southeast. The second main phase of movement was during the Carboniferous, this time with a dextral sense.

The exact timing is uncertain, but associated folds