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Rocks

Across
Formed from the remains or organisms.
Intrusive igneous rock which forms as rising magma flows through fractures in the crust
Loose covering of weathered material that lies on Earth's surface.
Formed directly from minerals dissolved in seawater.
Down
Formed of mineral or rock fragments eroded from previously existing rocks.
Hazard associated with composite cones. Thick, heavy mixture of water and pyroclastic materials.
Large pluton, at least 100 square kilometers in are. Remain in magma chambers.
Mixture of pyroclastic material, steam, and hit gases that can move down the slope of a composite volcano.