Question
Tabular classification of igneous rocks
Answer :
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Igneous rocks are classified based on their mineralogical composition, texture, and chemical properties, and tabular classification provides a systematic framework to categorize them. This approach arranges igneous rocks in a table according to criteria such as silica content, alkali versus silica ratio, and mineral assemblages. One common basis for tabular classification is the QAPF diagram, which focuses on the relative proportions of Quartz (Q), Alkali feldspar (A), Plagioclase (P), and Feldspathoid (F) minerals in coarse-grained plutonic rocks. Rocks are placed in specific fields depending on these modal percentages, distinguishing
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