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. ?? 1984 Nature Publishing Group.
Citation Information
Publication Year | 1984 |
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Title | Trace element patterns at a non-marine cretaceous-tertiary boundary |
DOI | 10.1038/307224a0 |
Authors | J. S. Gilmore, J.D. Knight, C. J. Orth, C. L. Pillmore, R.H. Tschudy |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Nature |
Index ID | 70013392 |
Record Source | USGS Publications Warehouse |