The global fallout signature of the K-T bolide impact

Details The global fallout signature of the K-T bolide impact The global fallout signature of the K-T bolide impact

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...77..220a&link_type=abstract

Icarus (ISSN 0019-1035), vol. 77, Jan. 1989, p. 220-222.

Biology

11

Asteroids, Extinction, Fallout, Paleobiology, Cratering, Ejecta, Hypervelocity Impact

Scientific paper

Discrepancies in the geological record which have been claimed as evidence against the bolide-impact hypothesis of K-T extinctions are presently addressed by the possibility that crater ejecta would have risen above the earth's atmosphere. They would then have been dispersed globally along ballistic trajectories resulting in strongly nonuniform fallout thicknesses, as found in the geological record. The antipodal region would have a maximum thickness some 8 times greater than that of the background in most of its hemisphere of the globe.

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