New Evidence on the Size and Possible Effects of a Late Pliocene Oceanic Asteroid Impact

Details New Evidence on the Size and Possible Effects of a Late Pliocene Oceanic Asteroid Impact New Evidence on the Size and Possible Effects of a Late Pliocene Oceanic Asteroid Impact

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988sci...241...63k&link_type=abstract

Science, Volume 241, Issue 4861, pp. 63-65

Physics

28

Scientific paper

Debris from a late Pliocene asteroid impact is spread across at least 600 kilometers of the ocean floor in the southeast Pacific. On the basis of iridium concentrations in sediments from six deep-sea cores, the asteroid diameter was at least 0.5 kilometer; the impacting projectile may have been one of the largest in the last few million years. The stratigraphic age of this impact is the same as that inferred for the onset of Northern Hemisphere glaciation.

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