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).
Cretaceous-aged granodiorite with feldspar megacryst.
To explore another gigapan of this sample, click here:
A small outcrop showing two compositional members of the late Ordovician Georgetown Intrusive Suite.
Which came first, the light-colored one or the dark-colored one?
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