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Effects of Past Global Change on Life (1995) / Chapter Skim
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Pages 43-43

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From page 43...
... Late Ordovician trilobite mass mortality took place during and at the Rawtheyan-Hirnantian Stage boundary (Briggs et al., 19881. Hirnantian trilobites lived on the outer parts of marine shelves and were highly provincial (Lesperance, 19881.
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Key Terms

  • boundary interval
  • faunal turnover
  • late ordovician
  • mass mortality
  • oxygen isotope

  • persculptus zone
  • hirnantian stage
  • organic carbon
  • environmental changes
  • surface water

  • global cooling


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