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Igneous rocks - Igneous Rocks







Igneous rocks are formed from the solidification of molten rock material.



Annual Review of Earth and Planetary Sciences.






How Are Igneous Rocks Formed?








We would like to share some interesting, fun, and scientific facts about igneous rocks, which will not leave anyone indifferent.





Igneous rocks are an integral part of all rocks that make up our planet; that is why there are a lot of interesting facts to be shared.



There are five types of intrusive rocks, which are granite, pegmatite, gabbro, diorite and peridotite.

Intrusive rocks, also called rocks, cool slowly without ever reaching the surface.

Texture refers to the size, shape, and arrangement of the mineral grains or crystals of which the rock is composed.


Description: In older terminology, silica oversaturated rocks were called or acidic where the SiO 2 was greater than 66% and the family term quartzolite was applied to the most silicic.

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And there is a suite of ultramafic rocks with even more dark minerals and even less silica than basalt.

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    +139reps
    Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava . The magma can be derived from partial melts of existing rocks in either a planet 's mantle or crust.
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    +291reps
    Extrusive, or volcanic, igneous rock is produced when magma exits and cools as lava at or near the Earth's surface. Exposed to the relatively cool temperatures of the atmosphere, the lava cools quickly meaning that mineral crystals don't have much time to grow. This results in rocks with a very fine-grained or even glassy texture.
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    +349reps
    igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth material. Igneous rocks constitute one of the three principal classes of rocks, the others being metamorphic and sedimentary.
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    +44reps
    In general, igneous rocks appear dark, dull, and uniform, with no visible layering. However, they can be almost any color including very light gray, dark gray, pink, and green. The texture of igneous rocks varies from extremely coarse, large crystals to smooth and glassy depending on quickly they cool.
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    +68reps
    Granite. Granite is a type of igneous rock that consists of quartz (gray), plagioclase feldspar (white), and alkali feldspar (beige), plus dark minerals such as biotite and hornblende. Granite is used by the public as a catchall name for any light-colored, coarse-grained igneous rock.
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