Geography, asked by sabitrib97, 6 months ago

classify igneous rocks based on location

Answers

Answered by adithyaaravalli

Answer:

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Answered by Maharshi6408

Igneous rocks may be simply classified according to their chemical/mineral composition as felsic, intermediate, mafic, and ultramafic, and by texture or grain size: intrusive rocks are course grained (all crystals are visible to the naked eye) while extrusive rocks may be fine-grained (microscopic crystals) or glass (no crystalline structure; i.e., no minerals). Volcanic rocks, especially felsic and intermediate, often have a porphyritic texture characterized by visible crystals floating in a fine-grained groundmass.

Shown below is a simple classification scheme. Alternative, complex classification schemes take into account finer gradations in composition and especially the varying amounts of the elements potassium, aluminum, sodium, and calcium.

Note that felsic rocks are light in color; intermediate rocks range through grays, and mafic rocks are black in color. Ultramafic rocks (peridotite) may range black to olive green (dunite) from the mineral olivine.

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