Classification of igneous rocks

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Igneous rocks, formed from the cooling and solidification of molten magma, are classified based on their mineral composition, texture, and chemical composition. This classification scheme helps geologists understand the rock's origin, conditions of formation, and geological history.

1. Texture: Igneous rocks can have various textures depending on the rate of cooling. For instance, rocks that cool slowly beneath the Earth's surface have larger crystals and are termed intrusive or plutonic. In contrast, rocks that cool rapidly on the surface have smaller crystals or glassy textures and are termed extrusive or volcanic.

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Degree : BACHELOR DEGREE PROGRAMMES
Course Name : Bachelor of Science
Course Code : BSCG
Subject Name : Petrology
Subject Code : BGYCT 135
Year : 2021 2022