in the Stac Fada Member of the Stoer Group at 1177±5 Ma interpreted to have formed immediately after emplacement of the ejecta blanket. Tectonic setting Variations in thickness and lithology are consistent with both the Stoer and Sleat/Torridon Groups being deposited in a rift setting. Evidence from seismic reflection data in the Minch suggests that the Minch Fault was active throughout the deposition of the Torridon Group. This is consistent with the generally westerly derived pebbly material throughout the thickness of the Applecross Formation, suggesting a constantly rejuvenated sediment source in that direction. More recent work has suggested that although the Stoer and Sleat Groups were probably deposited in a rift setting, the scale and continuity of the Torridon Group, particularly the Applecross and Aultbea Formations, is more consistent with a molasse type setting possibly related to the Grenville Orogeny. References Sandstone in the United Kingdom Geology of Scotland Caithness Sutherland Ross and Cromarty Skye and Lochalsh Stratigraphy of the United Kingdom Torridon