The origin of the iridium anomaly at the Cretaceous-Tertiary boundary

Details The origin of the iridium anomaly at the Cretaceous-Tertiary boundary The origin of the iridium anomaly at the Cretaceous-Tertiary boundary

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983geokh.....1160n&link_type=abstract

Geokhimiia (ISSN 0016-7525), Aug. 1983, p. 1160-1178. In Russian.

Mathematics

Logic

Geology, Iridium, Paleontology, Planetary Evolution, Geochemistry, Iron Meteorites

Scientific paper

An analysis of a number of geological sequences of the USSR and Denmark confirms the existence and elucidates the characteristics of the iridium anomaly at the Cretaceous-Tertiary boundary. It is suggested that this anomaly may be explained by the collision of a large cosmic body (or group of bodies) with the earth. Geochemical data suggest that the hypothetical body belongs to the II AB group of iron meteorites. The consequences of the cosmic catastrophe at the end of the Mesozoic are examined from the standpoint of geological and paleontological data.

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