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

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