Which way is "up"?
Where are the contacts? Which came first?
Contact between sedimentary rock and intrusive igneous dike. The sedimentary rock is of the Triassic-aged host rocks of the Auchenhew Mudstone Formation ("New Red Sandstone").
An artistic interpretation of the local geology and the shuffling of layers that trumps superposition.
Caves uphill from Corrie, on Arran's east coast.
Cave uphill from Corrie, Arran, showing Permian limestones full of enormous brachiopod fossils.
Mylonite at Corrie Sands, Islay, Scotland
Near Clachtoll, there is a nice groove cut into the 3.0 Ga Lewisian basement and filled with 1.2 Ga breccia at the base of the Clachtoll Formation of the Stoer Group.
The Stoer Group lies below the Torridonian. The unconformity surface here has a lot of relief on it.
Oldest fossils in the United Kingdom.
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