| 31. | Microfossils found in chert extend the Barberton microfossil record back to 3.5 billion years.
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| 32. | Acids dissolve the limestone, revealing the microfossils in a recovery process called " acid etching ".
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| 33. | Initially they were known only from tooth-like microfossils called " conodont elements ".
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| 34. | But the explanation for these structures that we favor is that these are in fact microfossils from Mars.
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| 35. | Larger animals are too scarce in the fossil record for good statistics, so paleontologists have analyzed microfossil extinctions.
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| 36. | He started the research on the burial of microfossils in China and has developed the research on paleoceanography considerably.
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| 37. | A more informative data source is the organic microfossils of the Mount Cap formation, Mackenzie Mountains, Canada.
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| 38. | Although shell fragments had been recovered from the sediment cover in 1973, none of these deposits contained microfossils.
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| 39. | *Esther Applin was a super-awesome geologist who discovered that microfossils could be used for dating purposes.
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| 40. | Acritarchs samples are collected from drill core in places where Proterozoic microfossils have been reported, e . g.
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