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Question
A rock outcrop exposes a layer of obsidian overlain by volcanic ash and a layer with fragments of lapilli. What rock composition and eruptive type fits this description?A) basalt erupted from a cinder cone
B) basalt flows and interbedded andesite deposited on a shield volcano
C) andesite and basalt erupted from a stratovolcano
D) rhyolite erupted in violent pyroclastic eruptions
Answer
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