what are the main features if igneous rocks
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Igneous rocks form from the solidification of magma (molten rock). A reminder: magma is molten rock beneath the Earth's surface and lava is magma that is on the Earth's surface. The main characteristics of an Igneous rockare crystal size (grain size) and texture.
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Igneous rocks are also very important because their mineral and chemical makeup can be used to learn about the composition, temperature and pressure that exists within the Earth's mantle. They can also tell us much about the tectonic environment, given that they are closely linked to the convection of tectonic plates.
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