A) P-chert, Q-coal, R-conglomerate, S-limestone, T-gneiss, U-marble
B) P-basalt, Q-obsidian, R-slate, S-phyllite, T-shale, U-flint
C) P-basalt, Q-obsidian, R-conglomerate, S-limestone, T-rhyolite, U-scoria
D) P-basalt, Q-obsidian, R-conglomerate, S-limestone, T-gneiss, U-marble
E) None of these
Correct Answer: D
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