Comparing the Deep Sea Rock and Fossil Records of   Coccolithophores and Planktic Foraminifera  Graeme T. Lloyd1, Paul N. ...
Land-based rock and fossil records show strong                correlation…               N Maps                        Gen...
…but what about the deep sea?•Most microfossil groups are highly cosmopolitan…•…and massively abundant (1000s specimens pe...
The database             Coccoliths                         Planktic forams•35,416 species occurrences              •19,34...
Rock recordCoccoliths                 Planktic forams
Species recordCoccoliths                    Planktic forams
Generic recordCoccoliths                    Planktic forams
Species correlationCoccoliths                    Planktic forams
Generic correlationCoccoliths                    Planktic forams
Species detrendedCoccoliths                  Planktic forams
Genera detrendedCoccoliths                 Planktic forams
SubsamplingCoccoliths                 Planktic forams
Modelled versus observed diversityCoccoliths               Planktic forams
Model-corrected diversityCoccoliths                 Planktic forams
Summary•How does the deep sea rock record change over time?   •Exponential rise (opening ocean basin)•How does the deep se...
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Comparing the deep sea rock and fossil records of coccolithophores and planktic Foraminifera

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Comparing the deep sea rock and fossil records of coccolithophores and planktic Foraminifera

  1. 1. Comparing the Deep Sea Rock and Fossil Records of Coccolithophores and Planktic Foraminifera Graeme T. Lloyd1, Paul N. Pearson2, Jeremy R. Young1 and Andrew B. Smith1 1 Department of Palaeontology, Natural History Museum, London, UK 2 School of Earth & Ocean Sciences, Cardiff University, Cardiff, UK
  2. 2. Land-based rock and fossil records show strong correlation… N Maps Generic diversity
  3. 3. …but what about the deep sea?•Most microfossil groups are highly cosmopolitan…•…and massively abundant (1000s specimens per gram)•Many remarkably continuous sections (>10 million years)•Phylogenies often incorporate ancestors•The best record we have?:•How does the deep sea rock record change over time?•How does the deep sea fossil record change over time?•Are the deep sea rock and fossil records correlated?•How do the two major calcareous groups compare?
  4. 4. The database Coccoliths Planktic forams•35,416 species occurrences •19,349 species occurrences•16,197 samples •3,850 samples•205 sites •135 sites•4,329 names •2,462 names Geotectonic history
  5. 5. Rock recordCoccoliths Planktic forams
  6. 6. Species recordCoccoliths Planktic forams
  7. 7. Generic recordCoccoliths Planktic forams
  8. 8. Species correlationCoccoliths Planktic forams
  9. 9. Generic correlationCoccoliths Planktic forams
  10. 10. Species detrendedCoccoliths Planktic forams
  11. 11. Genera detrendedCoccoliths Planktic forams
  12. 12. SubsamplingCoccoliths Planktic forams
  13. 13. Modelled versus observed diversityCoccoliths Planktic forams
  14. 14. Model-corrected diversityCoccoliths Planktic forams
  15. 15. Summary•How does the deep sea rock record change over time? •Exponential rise (opening ocean basin)•How does the deep sea fossil record change over time? •Coccolith species ~linear rise •Coccolith genera ~rapid rise followed by slow fall •Forams: double sawtooth (K-T divides)•Are the deep sea rock and fossil records correlated? •Yes, strongly•How do the two major calcareous groups compare? •Forams seem to be less biased than coccos

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