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A subvolcanic rock, also known as a hypabyssal rock, is an intrusive igneous rock that is emplaced at depths less than 2 km within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic rocks and plutonic rocks. Subvolcanic rocks include diabase and porphyry. Common examples of subvolcanic rocks are diabase, quartz dolerite, microgranite, and diorite.
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