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Global fire at the Cretaceous-Tertiary boundaryCretaceous-Tertiary boundary clays rich in iridium from five sites in Europe and New Zealand were investigated. The clays are found to be 100-10,000-fold-enriched in elemental carbon (mainly soot), which is isotopically uniform and apparently comes from a single global fire. The soot layer coincides with the iridium layer, suggesting that the fire was triggered by meteorite impact and began before the ejecta had settled.
Document ID
19890024813
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wolbach, Wendy S.
(Chicago Univ. Chicago, IL, United States)
Gilmour, Iain
(Chicago, University IL, United States)
Anders, Edward
(Chicago, University IL; Bern, Universitaet, Switzerland)
Orth, Charles J.
(Los Alamos National Laboratory NM, United States)
Brooks, Robert R.
(Massey University Palmerston North, New Zealand)
Date Acquired
August 13, 2013
Publication Date
August 25, 1988
Publication Information
Publication: Nature
Volume: 334
ISSN: 0028-0836
Subject Category
Geophysics
Accession Number
89A12184
Distribution Limits
Public
Copyright
Other

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