Rhyolite forms when a mafic magma cools on Earth's surface.
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Q12: Magmas formed at subduction zones are mostly
Q13: Phaneritic textures indicate that the rock formed
Q14: Porphyritic textures suggest a complex cooling and
Q15: Volcanoes always erupt magmas of the same
Q16: Pegmatites are composed of very large crystals
Q18: Dikes are concordant and sills are discordant.
Q19: Laccoliths are more similar to sills than
Q20: Most batholiths are emplaced by the process
Q21: Geologists generally agree that batholiths are emplaced
Q22: Magma that is forcefully ejected into the
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