Clay Mineralogy of the Cretaceous-Tertiary Boundary Clay
- 4 February 1983
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 219 (4584) , 495-498
- https://doi.org/10.1126/science.219.4584.495
Abstract
Analyses of the clay mineralogy of samples from the Cretaceous-Tertiary boundary layer at four localities show that the boundary clay is neither mineralogically exotic nor distinct from locally derived clays above and below the boundary. The significant ejecta component in the clay that is predicted by the asteroid-impact scenario was not detected.Keywords
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