We highlight Earth's three main rock types, how they are formed and their common engineering uses.
Sandstone is another type of sedimentary rock and is, basically, compacted
Round pebbles can be compressed together to form a conglomerate. They are created from sediment deposited by rapidly moving rivers or waves on beaches deposit. Crushed versions of conglomerate rocks can be used to make aggregate for the production of concrete.Rocks are continuously dragged below the Earth's surface due to movements of the lithosphere. As you go deeper beneath the surface, there is a rise in temperature- around 25 degrees every kilometer.
This process will cause new minerals to grow, and in some rocks, with flat or elongated minerals, the pressure will squeeze and stretch minerals in patterns of lines or waves called foliation. In foliation, the minerals line up in layers perpendicular to the direction of pressure that is applied Rocks that are formed this way are known as foliated metamorphic rocks.
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