Full Title: The Cretaceous-Tertiary Boundary in the San Juan and Raton Basins, New Mexico and Colorado
Editors: James E. Fassett and J. Keith Rigby, Jr.
What if the 10-km asteroid, postulated by Alvarez et al., was not a type-1 carbonaceous chondrite and contained more, less, or even no iridium? What if all, or even some of the iridium was liberated from within the crust by the impact? What if there were no asteroid and the iridium originated on earth and was dispersed by a large number of volcanic eruptions. These and related questions have brought a new wave of geologists to the San Juan and Raton basins to study the K/T boundary there, one of the few places where terrestrial fossil vertebrates occur in abundance. These ten papers seem to argue against mass extinction at the boundary in this area and present major contributions to one of the great modern debates of geology.
Published: 3/23/1987
ISBN Number: 0813722098
Pages: 200
Product Category: EBooks