(adj) :
having been structurally altered as a result of, or resulting from, exposure to intense heat &/or pressure (at the contact zone between colliding plates, for example)
(n) :
a rock that has been changed from its original form by subjection to heat and/or pressure
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(adj) :
having been structurally altered as a result of, or resulting from, exposure to intense heat &/or pressure (at the contact zone between colliding plates, for example)
(n) :
a rock that has been changed from its original form by subjection to heat and/or pressure