Obsidian:
A) cools slowly and has a glassy appearance
B) cools rapidly and forms one large crystal
C) cools slowly and forms large crystals
D) cools rapidly and has a glassy appearance
Correct Answer:
Verified
Q8: The most obvious, but most unreliable, property
Q9: Rocks that form from deposition, compaction, and
Q10: Metamorphic rocks are rocks that have changed
Q11: Generally, extrusive rocks are characterized by their
Q12: As the rate of cooling decreases, crystal
Q14: Another term used to describe a dark-colored
Q15: Granite and gabbro have:
A) similar coarse grained
Q16: Magma that cuts through rock layers, cools,
Q17: Laccoliths are:
A) large discordant structures that bulge
Q18: Separation along planes of rock without any
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