Ancient lava flow.
Lava flow (with interesting 'mega-swirl' feature) over agglomerate. Devonian in age.
Sample of boninite.
Sea stacks along the coast of Shetland north of Eshaness - the rock is Devonian volcanics (lava + agglomerate).
To explore a gigapan of the outcrop where this sample was collected, click here:
Cretaceous-aged granodiorite with feldspar megacryst.
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