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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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Madam Madam
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6 years ago
One important reason we do not know much about the geologic history of the Precambrian is that ________.
 
  A) the climate was so harsh that erosion removed most of the rocks that formed during the Precambrian.
  B) rocks did not exist during much of that time
  C) radioactivity was not measurable during the Precambrian
  D) there are very few fossils preserved in Precambrian rocks
  E) we have not yet been able to establish the half-lives for radioactive elements that existed in the Precambrian
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HadajahpopeHadajahpope
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6 years ago
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Madam Author
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6 years ago
Brilliant ツ
dianeflunder
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Yesterday
Good timing, thanks!
tcat
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2 hours ago
Helped a lot
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