EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Bonté et al. 1984
Bonté, P., Delacotte, O., Renard, M., Boclet, D., Rocchia, R., Laj, C. and Jehanno, C. (1984). An Iridium rich layer at the Cretaceous/Tertiary boundary in the Bidart section (Southern France). Geophysical Research Letters 11: doi: 10.1029/GL011i005p00473. issn: 0094-8276.

We have measured an anomalous iridium concentration in the clays of the Cretaceous/Tertiary boundary in the Bidard section, thus confirming the planetary character of this anomaly. The iridium anomaly is synchronous with a very sharp minimum of the 13C/12C ratio and there is no evidence of any other iridium enrichment in marly concentrations away from the boundary. The integrated iridium content is of the same order of magnitude as that calculated from deep sea cores in the Pacific Ocean. In spite of a careful search, we have found no evidence of any exotic material.

BACKGROUND DATA FILES

Abstract

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit