- C. J. Orth, M. Attrep Jr., X. Y. Mao, E. G. Kauffman, R. Diner, W. P. Elder
- First published: April 1988 https://doi.org/10.1029/GL015i004p00346 Citations: 28
- Abstract
Two iridium abundance peaks, both 0.11 ppb (whole‐rock basis) over local background of 0.017 ppb, have been found in Middle Cretaceous marine rocks near Pueblo, Colorado. They occur just below the 92‐million‐year‐old Cenomanian‐Turonian (C‐T) stage boundary.
Continue reading “Iridium abundance maxima in the Upper Cenomanian extinction interval”
