Complete the following reaction sequence,giving structural details of all key intermediates. 
Definitions:
Eruption Column
A column of hot volcanic ash and gas ejected into the atmosphere during an explosive volcanic eruption.
Felsic
Describes igneous rocks that are rich in light-colored minerals such as quartz and feldspars.
Volcanic Breccia
A type of rock composed of large volcanic fragments, often formed during explosive volcanic eruptions.
Pyroclastic Flow
A fast-moving current of hot gas and volcanic materials (such as ash and lava fragments) that flows along the ground after an eruption, capable of causing destruction.
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