Which volcanic feature forms when magma cools rapidly in a volcanic pipe?

💡 Explanation

When magma solidifies within the conduit of a volcano, differential erosion exposes the solidified core as a volcanic neck because the surrounding softer material erodes away faster. Therefore a volcanic neck results, rather than a caldera lake, lava tube or fumarole field which involve different formative geological processes.

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• Which outcome occurs when pyroclastic flow interacts cryosphere environments?
• Which geologic process primarily scours and deepens a fjord's U-shaped valley profile?
• Which catastrophic impact happens because shield volcanoes exceed capacity?
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