Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

Journal Article

Seawater Strontium Isotopes, Acid Rain, and the Cretaceous-Tertiary Boundary

J. D. Macdougall
Science
New Series, Vol. 239, No. 4839 (Jan. 29, 1988), pp. 485-487
Stable URL: http://www.jstor.org/stable/1700277
Page Count: 3

You can always find the topics here!

Topics: Strontium, Sea water, Oceans, Precipitation, Strontium isotopes, Acid rain, Dissolution, Bolides, Ratios, Silicates
Were these topics helpful?
See something inaccurate? Let us know!

Select the topics that are inaccurate.

  • More info
  • Add to My Lists
  • Cite this Item
Seawater Strontium Isotopes, Acid Rain, and the Cretaceous-Tertiary Boundary
Preview not available

Abstract

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.

Page Thumbnails

  • Thumbnail: Page 
485
    485
  • Thumbnail: Page 
486
    486
  • Thumbnail: Page 
487
    487
Part of Sustainability