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Q18: The most abundant rock type deposited during
Q32: Early gases which had begun to accumulate
Q34: Isograds separate different metamorphic zones.
Q35: Why are most intermediate- to deep-focus earthquakes
Q39: What are the most common triggering mechanisms
Q40: How does relative dating differ from absolute
Q46: Divergent plate boundaries are responsible for most
Q57: What are the two most important sources
Q66: Chinese seismologists have successfully predicted several earthquakes
Q76: Sandstone-carbonate-shale assemblages comprise _ percent of the