These features classify limestone as a sedimentary rock. Granite is a very hard rock made from large crystals. It does not react with acids. These features help to classify granite as an igneous rock.

Igneous rock is formed by the cooling of molten rock ... which generally destroys any fossils that were in the rock before it was metamorphosed. For example, marble is created when limestone is ...

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Igneous rocks form from the solidification of molten ... They form in sedimentary rocks like limestone, where mineral-rich ...