migmatite

/mɪɡmətʌɪt/

IPA: /M IH1 G M AH0 T AY0 T/

noun
  1. 1

    Any rock of mixed appearance, being an intimate mixture of granite and older rock, specifically from intense metamorphism which partially melts the rock, causing it to recrystallize in a state intermediate between igneous and metamorphic.

Source: https://en.wiktionary.org/wiki/migmatite