GRD0045S0
I-157
Basalt
Cenozoic › Quaternary
0.01
-
2.6
1
Ritter 154 › Cabinet 20 › Drawer E
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Fine grained fissile lava flow. Thin section extremely different than hand sample (wrong number?).
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Tristan Da Cunha
Tristan da Cunha: 100 yards W of Pinnacle, Hottentot gulch, 900 elev