Iridium abundance maxima in the Upper Cenomanian extinction interval

Details Iridium abundance maxima in the Upper Cenomanian extinction interval Iridium abundance maxima in the Upper Cenomanian extinction interval

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15..346o&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 15, April 1988, p. 346-349. DOE-NASA-supported research.

Other

10

Abundance, Geochemistry, Iridium, Marine Chemistry, Meteorites, Sedimentary Rocks, Colorado, Gulf Of Mexico

Scientific paper

Two iridium abundance peaks, both 0.11 ppb (whole-rock basis) over a 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. No other peaks were found in 45 meters of strata (about 2.5 million years of deposition) above and below the boundary interval. The broad lower peak straddles the first in a series of extinctions of benthic and nektonic macrobiota which comprise the C-T extinction event. The sharp upper peak occurs stratigraphically about 1.2 meters above the lower peak. The excess Ir might be from meteoroid impacts.

Affiliated with

Also associated with

No associations

Rating

Iridium abundance maxima in the Upper Cenomanian extinction interval does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Iridium abundance maxima in the Upper Cenomanian extinction interval, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iridium abundance maxima in the Upper Cenomanian extinction interval will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-849006