Textures of Igneous Rocks Part-1 | Igneous petrology | Geology | Geography | GATE | NET | UPSC

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• Texture is the size, shape and arrangement of mineral grains in a Rock
• It can also be described as a mutual relationship of Mineral grains and glassy matter in a Rock.
• Texture is best studied under thin section (0.03mm)

• Why Read about Textures?
• The texture of a rock is a result of various processes that controlled the rock’s genesis and, along with mineralogy and chemical composition, provides information that we may use to interpret the rock’s origin and history. It is thus important for us to be able to recognize and describe the textures of a rock and to understand how they are developed.

Contents of Parts -1 :
• Introduction to texture
• Primary and Secondary textures
• Formation of Mineral crystals:
• Nucleation
• Crystal growth
• Diffusion
• Rates of nucleation , crystal growth, diffusion
• Bi modal grain size
• Basic classification of textures
Part-2 Important Textures:
Epitaxis, Spherulitic , Graphic , Granophyre,
Myrmekitic, Seive Texure, Cumulate Textures, Ophitic Texture, Pyroclastic textures etc.
https: https://t.me/+VOV8D-rq687H0dRr
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