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

a.
extremely slow cooling
b.
cooling in the presence of oxygen

2 Answers

3 votes

Answer:

a

Step-by-step explanation:

User Nguyendown
by
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4 votes
extremely fast cooling in addition the presence of SiO2 at high concentrations
User Chris Sullivan
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9.1k points