ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Investigations of the Cretaceous/Tertiary boundary reveal that the boundary event left a signature in an iridium anomaly and a carbon isotope anomaly2'3. The dual Ir-5I3C anomalies were also found recently in a Permian/Triassic boundary clay4. The exact placement of Precambrian/Cambrian boundary ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/316809a0
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