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What rock forms much of the land of Rio de Janeiro in Brazil?

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What rock forms much of the land of Rio de Janeiro in Brazil?
posted Oct 3, 2023 by Mishthy Mukherjee

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1 Answer

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Gneiss
Gneiss is an extremely hard rock. It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks.

answer Oct 5, 2023 by Anuradha Tabyal
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