Which igneous texture is characterized by two distinctively different crystal sizes?
A) glassy
B) porphyritic
C) fine- grained
D) coarse- grained
Correct Answer:
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Q1: Intrusive igneous rocks are often coarse- grained
Q2: Why do crystals in a magma stop
Q3: If magma or lava cools quickly, the
Q4: Rhyolite is the fine- grained equivalent of
Q6: What is required for an igneous rock
Q7: A porphyritic texture where large crystals are
Q8: What is the difference between "magma" and
Q9: Which one of the following is an
Q10: Igneous rocks with an andesitic composition _.
A)
Q11: Obsidian exhibits a_ texture.
A) porphyritic
B) glassy
C) fine-
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