Trace element patterns at a non-marine Cretaceous-Tertiary boundary

Trace element patterns at a non-marine Cretaceous-Tertiary boundary

At the fossil-pollen-defined Cretaceous–Tertiary boundary in the Raton Basin of New Mexico and Colorado, an iridium abundance anomaly and excess scandium, titanium, and chromium are associated with a thin ash or dust fallout bed (now kaolinitic clay) that was preserved in freshwater coal swamps.

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Bibliographische Detailangaben
Veröffentlicht in:Nature (London) 1984-01, Vol.307 (5948), p.224-228
Hauptverfasser: Gilmore, J. S, Knight, J. D, Orth, C. J, Pillmore, C. L, Tschudy, R. H
Format: Artikel
Sprache:eng
Schlagworte:
Humanities and Social Sciences
multidisciplinary
Science
Science (multidisciplinary)
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Zusammenfassung:At the fossil-pollen-defined Cretaceous–Tertiary boundary in the Raton Basin of New Mexico and Colorado, an iridium abundance anomaly and excess scandium, titanium, and chromium are associated with a thin ash or dust fallout bed (now kaolinitic clay) that was preserved in freshwater coal swamps.
ISSN:0028-0836
1476-4687
DOI:10.1038/307224a0