Mathematics – Logic
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992e%26psl.109..593m&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 109, no. 3-4, April 1992, p. 593-600.
Mathematics
Logic
3
Cretaceous-Tertiary Boundary, Geochronology, Paleontology, Fossils, Stratigraphy
Scientific paper
Detailed biostratigraphic analysis (planktonic foraminifera and nannofossils) of sixteen K/T (Cretaceous/Tertiary) boundary sections in and near the Brazos River, Falls County, Texas indicates that a lithologically distinctive, coarse clastic event bed previously attributed to a meteorite impact-generated tsunami at the end of the Cretaceous was actually deposited during the early Tertiary (Danian: K/T + at least 230,000 years). A tsunami origin for this event bed is doubtful, but if a bolide-splashdown tsunami did generate the event bed, this putative meteorite impact must have occurred well into the Danian during the post-extinction, faunal recovery phase having little effect on extant foraminiferal and coccolith populations.
Montgomery Harry
Munoz I.
Pessagno E.
Pessagno J.
Smith Christopher
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