Proximal Cretaceous-Tertiary boundary impact deposits in the Caribbean

Details Proximal Cretaceous-Tertiary boundary impact deposits in the Caribbean Proximal Cretaceous-Tertiary boundary impact deposits in the Caribbean

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990sci...248..843h&link_type=abstract

Science (ISSN 0036-8075), vol. 248, May 18, 1990, p. 843-847.

Mathematics

Logic

59

Caribbean Region, Cretaceous-Tertiary Boundary, Ejecta, Meteorite Collisions, Mineral Deposits, Sediments, Structural Basins

Scientific paper

Trace element, isotopic, and mineralogic studies indicate that the proposed impact at the Cretaceous-Tertiary boundary occurred in an ocean basin, although a minor component of continental material is required. The size and abundance of shocked minerals and the restricted geographic occurrence of the ejecta layer and impact-wave deposits suggest an impact between the Americas. Coarse boundary sediments at sites 151 and 153 in the Colombian Basin and 5- to 450-meter-thick boundary sediments in Cuba may be deposits of a giant wave produced by a nearby oceanic impact.

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