Which rocks are known as Primary rocks?

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Igneseous rocks
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Igneseous rocks
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Igneous rocks
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Igneous rocks
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Igneous rocks
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igneous
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The rocks to have been first formed are called Primary rocks.
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the rocks believed to have been first formed —called also primitive rocks eg: igneous rock
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Sedimentary and metamorphic rocks, which we will study later, may be thought of as derivative rocks. Igneous rocks are rocks formed from the crystallization of a liquid (molten rock). Igneous rocks may be divided into two categories. Intrusive or plutonic rocks crystallize from magma beneath the earth's...
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Sedimentary and metamorphic rocks, which we will study later, may be thought of as derivative rocks. Igneous rocks are rocks formed from the crystallization of a liquid (molten rock). Igneous rocks may be divided into two categories. Intrusive or plutonic rocks crystallize from magma beneath the earth's surface. read less
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Primary rocks are supposed to have been first formed, being crystalline and containing no organic remains, as granite, gneiss, etc
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