What condition results in magma cooling and forming a “glassy” igneous rock?

2 answers:

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It would be extremely rapid cooling because it would be too fast for mineral grains to grow. basalt is the aphanitic or fine-grained equivalent of gabbro. plutonic rocks are intrusive and generally consist of mineral grains coarse enough to be readily visible in a hand sample.

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Natasha2012 [34]2 years ago

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Answer:

c. extremely rapid cooling

Explanation:

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