WEBBASED DATABASES AND PALEOBIOGEOGRAPHY

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WEB-BASED DATABASES AND PALEOBIOGEOGRAPHY
ALLISTER REES
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ICEHOUSE WORLD
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Glossopteris
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Permian phytogeographic patterns and climate
data/model comparisons Rees, P.M., Ziegler,
A.M., Gibbs, M.T., Kutzbach, J.E., Behling, P.J.
Rowley, D.B. (2002). The Journal of Geology,
110 1-31.
Simulations of Permian climate and comparisons
with climate-sensitive sediments Gibbs, M.T.,
Rees, P.M., Kutzbach, J.E., Ziegler, A.M.,
Behling, P. Rowley, D.B. (2002). The Journal
of Geology, 110 33-55.
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Land-plant diversity and the end-Permian mass
extinction Rees, P.M. (2002). Geology, 30
827-830.
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Jurassic
Cretaceous
Tertiary
Recent
Carb.
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HOTHOUSE WORLD
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JURASSIC
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LATE JURASSIC COALS, EVAPORITES AND DESERT SANDS
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LATE JURASSIC PLANTS
microphyllous conifers microphyllous
cycadophytes
macrophyllous cycadophytes
intermediate conifers
pteridosperms
ginkgophytes macrophyllous conifers
ferns sphenophytes
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LATE JURASSIC PLANT DIVERSITY
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LATE JURASSIC COALS AND EVAPORITES
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LATE JURASSIC DINOSAURS
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LATE JURASSIC DINOSAURS, PLANTS BY PALEOLATITUDE
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LATE JURASSIC SUMMARY (1) Higher latitudes
absence or paucity of dinosaurs, abundant coals,
high-diversity floras (with abundant
macrophylls) Lower latitudes regional
co-occurrence of dinosaurs with evaporites,
low-diversity floras (with abundant
microphylls) SOME TAPHONOMIC FACTORS Arid
and semi-arid climates longer residence times on
the surface for vertebrate remains, increasing
bone concentrations Humid climates bones
degrade more quickly. Higher precipitation
mobilizes more ions in the soil, leaching
surface materials (e.g. organic acids), leading
to lower pH of forest soils and dissolution and
destruction of bone. Vegetation mediates
exchange of water, minerals, and nutrients,
affecting soil chemistry. Plant roots can
adversely affect bone preservation through soil
leaching of mineral components, as well as
physical degradation. The interplay between
these factors will at least in part be
responsible for the destruction or preservation
of an animals remains. LATE JURASSIC SUMMARY
(2) This may explain why dinosaur bones are
scarce to non-existent in higher latitudes, where
climates were generally warm and wet, with broad
tracts of gymnosperm forests dominating the
landscape.
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DATABASES HOME PAGE
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DINOSAURS AND PLANTS
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DINOSAURS AND PLANTS
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DATABASES HOME PAGE
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OVERVIEW
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OVERVIEW
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GEOGRAPHY
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GEOLOGIC AGE
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LITHOLOGIES
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LITHOLOGIES
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LITHOLOGIES
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FOSSILS
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FOSSILS
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VIEW DATA
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VIEW DATA
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VIEW DATA
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VIEW DATA
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VIEW DATA
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PALEOMAPS
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REFERENCES
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REFERENCES
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REFERENCES
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IT DETAILS
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