Late Eocene microtektites and radiolarian extinctions on Barbados

Details Late Eocene microtektites and radiolarian extinctions on Barbados Late Eocene microtektites and radiolarian extinctions on Barbados

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.314..613s&link_type=abstract

Nature (ISSN 0028-0836), vol. 314, April 18, 1985, p. 613-615.

Computer Science

35

Barbados, Metal Oxides, Meteoritic Composition, Micrometeorites, Tektites, Extinction, Fragments, Iridium, Radiogenic Materials

Scientific paper

A late Eocene microtektite layer found in three exposed sections on Barbados, West Indies is compositionally similar to the North American tektites and thus may belong to the strewn field of North American microtektites. The North American layer has been reported to be approximately synchronous with several radiolarian extinctions and with an anomaly in iridium concentrations. It is reported here that the radiolarian extinctions predate the microtektite layer and that the highest Ir concentrations apparently coincide with the extinctions. Thus, although the extinctions may be causally related to the Ir anomaly, the microtektites appear not to be.

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