Cretaceous age for the feathered dinosaurs of Liaoning, China
Article Abstract:
The uniquely preserved range of fossil found in the ancient lake beds of the lower part of the Yixian Formation, Liaoning Province, northeastern China have provided new information on bird-dinosaur relationships, the early diversification of birds and the origin and evolution of flowering plants. Estimates of the geological age have varied between the Late Jurassic and Early Cretaceous. A dating study suggests that the lower Yixian fossil horizons are middle Early Cretaceous.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Selectivity of extinction among sea urchins at the end of the Cretaceous period
Article Abstract:
Sea urchins experienced 36% extinction during the end of the Maastrichtian age and continued to die during the Danian age. Studies have shown that there was a strong link between survival and the feeding mechanism which was used by the sea urchins. Supply of nutrients was also shown to be of critical importance. However, larvae which needed to feed before developing were not more likely to become extinct than larvae which did not need to feed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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An early Cretaceous pellet
Article Abstract:
Research is presented describing the study of early Cretaceous bird pellets which suggest the beginning stages of preying activity amongst bird colonies.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
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