Obsidian exhibits a________ texture.
A) porphyritic
B) glassy
C) fine- grained
D) coarse- grained
Correct Answer:
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Q6: What is required for an igneous rock
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Q10: Igneous rocks with an andesitic composition _.
A)
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Q14: Which of the following is not true
Q15: Granite and gabbro_ .
A) have a similar
Q16: Select from the list below the coarse-
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