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Do not have a layered or banded appearance.

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Foliated rocks have a layered or banded appearance that is produced by exposure to heat and directed pressure.

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Modified by heat, pressure, and chemical processes, usually while buried deep below Earth's surface.

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Form by chemical precipitation that begins when water traveling through rock dissolves some of the minerals.

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Form from the accumulation of plant or animal debris.

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Clastic sedimentary rocks are made up of pieces (clasts) of pre-existing rocks.

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Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms

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Extrusive rocks are produced when magma exits and cools above (or very near) the Earth's surface.

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Intrusive rocks form when magma remains inside the Earth's crust where it cools and solidifies in chambers within pre-existing rock

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Igneous rocks form when hot, molten rock crystallizes and solidifies. 