Mudstone, shale, and limestone are examples of sedimentary ... us a lot about the history of our planet. Igneous rock is formed by the cooling of molten rock, either at the surface (lava), or ...

For example, the rock malachite is mostly made ... Granite is an intrusive igneous rock. Granite has large crystals which can be easily seen with the naked eye. This makes it attractive and ...

The ancient Romans and Egyptians used granite widely, and ever since the properties of this tough and durable igneous rock have made granite a favorite material in the creation of some of the ...