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11 January, 11:48

Which phrases apply to metamorphic rocks? Check all that apply. form under extreme heat and pressure

form from existing rocks

form from magma and lava

form when sediments combine

form from volcanic eruptions

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Answers (2)
  1. 11 January, 14:03
    0
    The metamorphic rocks are formed from existing rocks under extreme heat and pressure.

    Explanation:

    The metamorphic rocks are a denser version of igneous and sedimentary rocks. When an igneous or sedimentary rock is subjected to extreme heat and pressure for a prolonged period, the composition of the existing rocks changes to become more concentrated, which eventually results into the formation of metamorphic rocks. Metamorphic rocks are usually formed in the lithosphere and the asthenosphere, two uppermost layers of the Earth's crust.
  2. 11 January, 14:54
    0
    Options (1) and (2)

    Explanation:

    When rocks are subjected to high pressure and temperature condition, then it gives rise to the formation of metamorphic rock. They are commonly recognized as a secondary type of rocks because of its direct derivation from either igneous, sedimentary or other metamorphic rock. Some of the examples of metamorphic rocks are Marble, Quartzite, Schist and Gneiss.

    These rocks are generally the high-grade rocks. This means that they are formed at a condition where the temperature and pressure are extremely high.

    Thus, the correct answers are option (1) and (2).
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