Seawater strontium isotopes, acid rain, and the Cretaceous-Tertiary boundary

Details Seawater strontium isotopes, acid rain, and the Cretaceous-Tertiary boundary Seawater strontium isotopes, acid rain, and the Cretaceous-Tertiary boundary

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988sci...239..485m&link_type=abstract

Science (ISSN 0036-8075), vol. 239, Jan. 29, 1988, p. 485-487. NASA-NSF-supported research.

Other

27

Acid Rain, Bolides, Nitrogen Oxides, Sea Water, Shock Heating, Strontium Isotopes, Atmospheric Effects, Chondrites, Paleoclimatology

Scientific paper

A large bolide impact at the end of the Cretaceous would have produced significant amounts of nitrogen oxides by shock heating of the atmosphere. The resulting acid precipitation would have increased continental weathering greatly and could be an explanation for the observed high ratio of strontium-87 to strontium-86 in seawater at about this time, due to the dissolution of large amounts of strontium from the continental crust. Spikes to high values in the seawater strontium isotope record at other times may reflect similar episodes.

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