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Effects of Past Global Change on Life (1995) / Chapter Skim
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Pages 72-72

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From page 72...
... Return to a more stable ecosystem and to increased marine productivity in low latitudes does not occur until about 250,000 to 350,000 yr after the K/T boundary, coincident with the extinction of Cretaceous survivors in high latitudes. Within this transition interval, habitats of deep- and intermediate-dwelling tropical planktic foraminiferal species are gradually and selectively eliminated in low latitudes, and by K/T boundary time only cosmopolitan surface dwellers survive.
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Key Terms

  • species extinctions
  • planktic foraminiferal
  • planktic foraminifera
  • cretaceous survivors
  • environmental changes

  • foraminiferal species


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