ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] DINOSAURS and ammonites are probably the best-known examples of the many species that became extinct at the Cretaceous-Tertiary (K-T) boundary12. Because there are unusually high concentrations of iridium in the clays at the boundary, it is possible that the biotic changes were caused by asteroid ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/324112a0
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