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The most commonly occurring type of metamorphic rocks are gneiss and ________?

1) shale
2) coal
3) limestone
4) magma
5) schist

1 Answer

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Final answer:

Schist is the most commonly occurring type of metamorphic rock, alongside gneiss.

Step-by-step explanation:

The most commonly occurring type of metamorphic rock, in addition to gneiss, is schist. Schist is a medium- to high-grade, foliated metamorphic rock characterized by its platy or layered structure. It forms from the metamorphism of various rock types, such as shale, sedimentary rocks, or other schists.

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