A Rock Outcrop Exposes a Layer of Obsidian Overlain by Volcanic

question 43

Multiple Choice

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

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