How Are Metamorphic Rocks Formed and What Do they Look Like?

Metamorphic rocks are formed from the alteration of pre-existing rock types (igneous, sedimentary or already formed metamorphic rocks) through metamorphism. The pre-existing rock, also known as protolith, is subjected to both heat and pressure, which causes chemical or physical changes.  These types of rocks form a huge part of the Earth’s crust and make up 12 […]

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Sedimentary Rock: Types and How They Are Formed?

Rocks are generally grouped into igneous, metamorphic and sedimentary rocks. Sedimentary rocks are usually well exposed on the earth’s surface and in water bodies as well. Rock materials from pre-existing rocks (such as metamorphic, igneous and previously shaped sedimentary rocks) that have been eroded, weathered and compacted over time, make up sedimentary rocks. These types of […]

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