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Presentacion metamorficas lucía tessier
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Presentacion metamorficas lucía tessier

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  • 1. Las rocas metamórficas son las que se forman a partir de otras rocas mediante un proceso llamadometamorfismo. El metamorfismo se da indistintamente en rocas ígneas, rocas sedimentarias u otras rocasmetamórficas, cuando estás quedan sometidas a altas presiones(alrededor de 1500bar), a altastemperaturas(entre 150 y 200) o a un fluido activo que provocan cambios en la composición de la roca, aportando nuevas sustancias a ésta. Al precursor de una rocas metamórfica se le llama protolito.
  • 2. Rocas foliadas:pizarra, esquisto y gneis.
  • 3. Rocas no foliadas:cuarcita, mármol y corneanas
  • 4. Ciclo de las rocas