1. Sills in the Loch Scridain Sill Complex on the Isle of Mull, Scotland cut through variously oriented host rock layers and structures at a consistent northwest-southeast dip of approximately 26 degrees, indicating the sills were controlled by the regional stress state rather than host rock mechanical layering. 2. Future work will further study the emplacement of sills to better understand the regional stress state during intrusion and examine the potential for sill distributions to record horizontal shortening. 3. Sills may represent magma-filled faults and therefore record the orientation of the maximum compressive stress, challenging the conventional view that sills solely form parallel to the maximum compressive stress within mechan