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Metamorphic Rock Notes
Metamorphic Rocks- a rock that has been changed due
to heat and pressure
Recrystallization- a process in which rocks undergo
change without true melting
Type of Metamorphism
Regional Metamorphism
 Due to heat and
pressure
 Occurs over a large
area
 Usually associated
with Mountain
building
 Rocks can be
Foliated or
Nonfoliated
Contact Metamorphism
 Due to only heat
 Occurs over a small
area
 Occurs when magma or
lava comes into
contact with
surrounding rock.
 Rocks are
Nonfoliated
Foliated – when the minerals are aligned in rocks
such that they are easy to split
 Occurs due to pressure