GRD0044S0
I-156
Basalt
Cenozoic › Quaternary
0.01
-
2.6
0
Ritter 154 › Cabinet 20 › Drawer E
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Fine-grained lava flow
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Tristan Da Cunha
Tristan da Cunha: flow forming 3rd waterfall above largest waterfall, Hottentot gulch, elev 1500