metamorphic rocks

Lori B.
9 words 8 learners

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  1. metamorphic
    having undergone transformation by pressure, heat, etc.
    Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form".
  2. sedimentary rock
    rock formed from consolidated clay deposits
    The protolith may be sedimentary rock, igneous rock or another older metamorphic rock.
  3. igneous rock
    rock formed by the solidification of molten magma
    The protolith may be sedimentary rock, igneous rock or another older metamorphic rock.
  4. metamorphism
    change in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substances
    Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form".
  5. quartzite
    hard metamorphic rock consisting essentially of interlocking quartz crystals
    Some examples of metamorphic rocks are gneiss, slate, marble, schist, and quartzite.
  6. tectonic
    pertaining to the structure or movement of the earth's crust
    They can form from tectonic processes such as continental collisions, which cause horizontal pressure, friction and distortion.
  7. Earth's crust
    the outer layer of the Earth
    Metamorphic rocks make up a large part of the Earth's crust and are classified by texture and by chemical and mineral assemblage (metamorphic facies).
  8. chemical change
    process determined by substances' composition and structure
    The original rock (protolith) is subjected to heat and pressure, (temperatures greater than 150 to 200 °C and pressures of 1500 bars[1]) causing profound physical and/or chemical change.
  9. igneous
    produced by the action of fire or intense heat
    The protolith may be sedimentary rock, igneous rock or another older metamorphic rock.
Created on Fri Nov 02 12:17:46 EDT 2012

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