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Types of Rocks

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  • heat from magma alters surrounding rock
    contact metamorphism
  • fine grained igneous rocks that cooled quickly
    extrusive
  • chert is a ____ rock
    sedimentary
  • extreme temperatures and pressures and chemical changes affect the structure and composition of rock
    metamorphism
  • how are foliated and nonfoliated metamorphic rocks different
    foliated has stripes
  • sedimentary rock formed from pieces of broken rock
    clastic
  • obsidian is a/an ______ igneous rock
    extrusive
  • formed from cooling magma/lava
    igneous
  • igneous rocks with high levels of silica are called
    felsic
  • granite
    igneous
  • formation of large areas of metamorphic rock, usually in mountain areas
    regional metamorphism
  • igneous rocks that have large crystals because they cooled slowly
    intrusive
  • sandstone is an example of ______ sedimentary rock
    clastic
  • formed when dissolved minerals crystallize (precipitate) directly from water
    chemical sedimentary rock
  • limestone made from the shells of dead organisms is ________ sedimentary rock
    biochemical
  • formed from compaction and cementation of sediment
    sedimentary
  • gneiss is a/an _____
    metamorphic rock
  • pumice
    igneous
  • mafic rocks tend to be what color
    darker colors
  • formed when heat/pressure alter rock composition and structure
    metamorphic
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