metamorphic rock dark grey in colour.used to make roofs and blackboards
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slate is used to make....slate is a metamorphic rock,so the statement could be considered right.............
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Answer:
Slate.
Explanation:
Slate is a foliated, fine-grained similar metamorphic rock dawned from an independent shale-type sedimentary mineral composed of ash or mud produced from the volcano and also through the method of second-rate metamorphism.
Foliation may not resemble the original sedimentary layering but alternatively is in planes uninterrupted to the direction of metamorphic compression. It is used in a number of places such as floors, roofing and for the purpose of writing on blackboard due to its durability and attractive manner.
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