A volcanic neck (or plug) is a landform created when magma solidifies within the central vent of an active volcano. Over millions of years, the surrounding softer ash and cinder cone are eroded away by wind and water, leaving behind ...
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A volcanic neck (or plug) is a landform created when magma solidifies within the central vent of an active volcano. Over millions of years, the surrounding softer ash and cinder cone are eroded away by wind and water, leaving behind ...