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The document provides a classification of various igneous rocks based on their grain size, texture, and silica content. It categorizes rocks into intrusive (plutonic) and extrusive (volcanic) types, detailing their characteristics such as being felsic, intermediate, or mafic. Each rock type is described with specific silica percentage ranges and textures, such as phaneritic and porphyritic.

Author

am1424412

Language

EN