Deposit from a Giant Wave on the Island of Lanai, Hawaii
- 14 December 1984
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 226 (4680), 1312-1315
- https://doi.org/10.1126/science.226.4680.1312
Abstract
Dinosaur extinction in Montana, Alberta, and Wyoming was a gradual process that began 7 million years before the end of the Cretaceous and accelerated rapidly in the final 0.3 million years of the Cretaceous, during the interval of apparent competition from rapidly evolving immigrating ungulates. This interval involves rapid reduction in both diversity and population density of dinosaurs. The last dinosaurs known are from a channel that contains teeth of Mantuan mammals, seven species of dinosaurs, and Paleocene pollen. The top of this channel is 1.3 meters above the likely position of the iridium anomaly, the Cretaceous/Tertiary boundary.Keywords
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