Precambrian Columnar Stromatolite Diversity: Reflection of Metazoan Appearance

@article{Awramik1971PrecambrianCS,
  title={Precambrian Columnar Stromatolite Diversity: Reflection of Metazoan Appearance},
  author={S. M. Awramik},
  journal={Science},
  year={1971},
  volume={174},
  pages={825 - 827}
}
  • S. M. Awramik
  • Published 1971
  • Biology, Medicine
  • Science
  • Columnar stromatolites (organosedimentary structures built by bluegreen algae) show a marked decrease in diversity in the Late Precambrian; this decrease in diversity occurs at approximately the same time as the appearance of metazoans, 600 to 700 million years ago. 
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