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Metamorphic rock
Meaning
Noun
●
In Geology & Rocks:
one of the major
groups
of
rock
that
makes up
the
crust
of the Earth;
consists of
pre-existing
rock
mass
in which new
minerals
or
textures
are
formed
at higher
temperatures
and
greater
pressures
than those present on the Earth's surface
Sourced from
Wiktionary
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