differentiate between sedimentary and metamorphic rocks
Answers
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Explanation:
Sediments which form layers, one above the other . Due to the pressure of the above layers and the presence of cementing particles , they are hardened to form sedimentary rocks.
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Rock which originally are igenous or sedimentary in nature , get changed in character and appearance due to the heat and pressure the rocks formed is called metamorphic rocks.
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Answer:
Extrusive or volcanic rocks:
These rocks are formed when magma breaks through the crust and reaches the surface of the earth (where it is called lava). It cools rapidly and solidifies to form rocks. The common rocks formed in this manner are basalt and obsidian.
Instrusive or plutonic rocks:
These rocks are formed when magma fails to break through the crust and cools slowly under the crust forming rocks. Because of slow cooling it solidifies into rocks with large grains of crystals. The common eg of rocks formed in this manner are granite and dolerite.
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Explanation: