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Chapter 2 Rocks Holt, Rinehart, and Winston

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rock
a solid mixture of crystals of one or more minerals or other materials
rock cycle
the process by which one rock type changes in another rock cycle
magma
the hot liquid that forms when rock partially or completely melt; may include mineral crystal
sedimentary rock
rock that forms when sediments are compacted and cemented together
metamorphic rock
rock that forms when the texture and composition of preexisting rock changes due to heat or pressure
igneous rock
rock that forms from the cooling magma
composition
the makeup of a rock; describes either the minerals or elements present in it
texture
the sizes, shapes, and positions of the grains that a rock is made of
intrusive
the type of igneous rock that forms when magma cools and solidifies beneath Earth's surface
extusive
the type of igneous rock that forms when lava or pyroclastic material coold and solifies on the Earth's surface
strata
layers of sedimentary rock that form from the deposition of sediment
stratification
the layering of sedimentary rock
foliated
the texture of metamorphic rockin which the mineral grains are aligned like the pages of a book
nonfoliated
the texture of metamorphic rock in which mineral grains show no alignment