With coral growing on the outside of the shell.
Fossil bivalve with aragonitic shell material, collected from the Cobham Bay Member of the Eastover Formation (Miocene), Atlantic Coastal Plain.
From this outcrop:
Pretty green rock, chock full of copper.
Meteorite impact ash deposits of ultramafic composition, deposited in a marine setting during the Archean Fig Tree Group of Barberton Mountain Land, South Africa.
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.
South Africa's Archean ultramafic lavas.
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