Question

the original rock from which Gniss formed is–​

Answer 1

Metamorphic rock

etamorphic rockGneiss is formed from another metamorphic rock called schist, which itself started out life as a sedimentary rock called shale. To form a gneiss you need to subject the original rock to very great pressures and allow time for new large crystals to grow slowly.

Answer 2

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Metamorphosis rocks

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