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Q3: Animals had begun to inhabit the land
Q5: Approximately 1.1 bya, Laurentia began splitting apart
Q8: The most accurate radiometric dates are obtained
Q14: During the early Paleozoic, sea levels were
Q19: Graded beds refer to sedimentary beds that
Q26: What are the primitive organisms thought to
Q27: Mineral diversity increased after the Great Oxygenation
Q27: A volcanic island arc is caused by
Q31: Analysis of _ is the best way
Q42: Most of the world's diamond resources formed