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Rock that forms from crystalization of molten magma or lava. There are two kinds; Intrusive igenous rock and Extrusive ingenus rock.

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Intrusive: rock formed slowly, deep inside the earth. Cools very slowly resulting in beautiful crystals.

Extrusive: rock formed quickly, on surface of the earth, creating fine grained or glassy texture such as baslat.

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Sediments or pieces of solid material that have been deposited on Earths surface by wind, water, ice, gravity, or chemical precipitation, become semented together to form sedimentary rocks.

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Clastic, Organic, and Chemical Sedimentary Rocks 

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Clastic, Organic, and Chemical Sedimentary Rocks 

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Clastic: Most common type, formed from a lot of deposits of loose sediments on the surface of the Earth. Rounded particles and angular fragments, high/ low porosity.

Organic: Calcium carbonate precipitates out of water, and crystallizes between grains carbonate sediment. Layers of vegetation accumulate in swamps and coastal areas, they are compressed and bureid and lithified into coal.

Chemical:

Evaporite minerals such as calcite, halite, and gypsum. Formed moslty through the evaporation of water.

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A rock that goes under intense heat and pressure and its appearance and physicial nature is changed. For example a Gneiss rock that was once granite when under metemorphises and changed.

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Foliated and non-foliated metamorphic rocks 

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Foliated and non-foliated metamorphic rocks 

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Foliated: Pressure elongates or squeezes crystals, creating a clear preferential alignment

Non-folated: No preferential alignment for crystals. Marble for example is the metamorphized version of limestone, and its made of minerlas that dont elongate, no matter the pressure.

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Untamed Science

ZME Science Types of Rock

Interactive Rock Cycle Links to an external site.