Hey!
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Answer:
Obsidian is an igneous rock.
Conglomentary is a sedimentary rock
Marble is an metamorphic rock.
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Step-by-step explanation:
Igneous Rock - which is formed through the process of solidification and cooling of magma.
Sedimentary Rock - which is formed through the process of particles being picked up from under bodies of water.
Metamorphic - Which is formed through the process of a rock going through physical or chemical changes.
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