This gallery holds the entire Mid-Atlantic Geo-Image Collection. Outcrops, landscapes, hand samples . . . they're all here.
Meteorite impact ash deposits of ultramafic composition, deposited in a marine setting during the Archean.
To explore a gigapan of the roadcut where this sample was collected, click here:
A different perspective, from lower down on the volcano.
Two samples of ultramafic lava flows from the Archean, showing spinifex texture.
A view from the top of Grábrók to the east.
South Africa's Archean ultramafic lavas.
Some of the oldest chert in the world.
Stem with needles, or a raggedy cone (?), Conemaugh Formation, Corridor H.
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