Geologic framework of nonmarine Cretaceous-Tertiary boundary sites, Raton Basin, New Mexico and Colorado

Details Geologic framework of nonmarine Cretaceous-Tertiary boundary sites, Raton Basin, New Mexico and Colorado Geologic framework of nonmarine Cretaceous-Tertiary boundary sites, Raton Basin, New Mexico and Colorado

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984sci...223.1180p&link_type=abstract

Science (ISSN 0036-8075), vol. 223, March 16, 1984, p. 1180-1183. Research supported by the U.S. Department of Energy.

Mathematics

Logic

13

Geochemistry, Sedimentary Rocks, Structural Basins, Coal, Iridium, Kaolinite, Pollen, Shales

Scientific paper

Iridium concentrations are anomalously high at the palynological Cretaceous-Tertiary boundary in fluvial sedimentary rocks of the lower part of the Raton Formation at several localities in the Raton Basin of New Mexico and Colorado. The iridium anomaly is associated with a thin bed of kaolinitic claystone in a discontinuous carbonaceous shale and coal sequence.

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