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Extrusive Igneous rock has ___________ grain size. I need help on this one
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Extrusive Igneous rock has ___________ grain size.
I need help on this one

User Nick Kennedy
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Step-by-step explanation:

Extrusive rocks may have a few grains that are large enough to see, but most of them will be too small to see individual minerals. ... The individual mineral grains are almost too small to see. Some extrusive rocks cool so quickly that they do not form any grains. Instead, they form a natural glass.

User AlexAndro
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