Impact cratering at geologic stage boundaries

Details Impact cratering at geologic stage boundaries Impact cratering at geologic stage boundaries

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..887s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 10, p. 887-890.

Mathematics

Logic

10

Cenozoic Era, Earth Surface, Hypervelocity Impact, Meteorite Craters, Data Correlation, Isotopes

Scientific paper

The largest known Cenozoic impact craters with the most accurately measured ages are found to correlate very closely with geologic stage boundaries. The level of confidence in this result is 98-99 percent even under the most pessimistic assumptions concerning dating errors. One or more large impacts may have led, in at least some cases, to the extinctions and first appearances of biotic species that mark many of the geologic stage boundaries.

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