Question

what is the meaning of crystalline rocks and coarse grained rocks?

Answer 1

Crystalline rock, any rock composed entirely of crystallized minerals without glassy matter. Intrusive igneous rocks—those that congeal at depth—are virtually always crystalline, whereas extrusive igneous rocks, or volcanic rocks, may be partly to entirely glassy.Coarse grain varieties (with mineral grains large enough to see without a magnifying glass) are called phaneritic. Granite and gabbro are examples of phaneritic igneous rocks. Fine grained rocks, where the individual grains are too small to see, are called aphanitic. Basalt is an example.

Answer 2

Answer:

Crystalline rock, any rock composed entirely of crystallized minerals without glassy matter. ... Metamorphic rocks are almost always crystalline; the term crystalline schists has been applied to indicate all rocks of metamorphic origin, and thus the term crystalline rocks may be taken to mean an igneous origin.

Explanation:

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