Glass from the Cretaceous/Tertiary boundary in Haiti

Details Glass from the Cretaceous/Tertiary boundary in Haiti Glass from the Cretaceous/Tertiary boundary in Haiti

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.349..482s&link_type=abstract

Nature (ISSN 0028-0836), vol. 349, Feb. 7, 1991, p. 482-487.

Astronomy and Astrophysics

Astrophysics

86

Cretaceous-Tertiary Boundary, Meteorite Collisions, Petrology, Silica Glass, Tektites, Calcium, Carbon Dioxide, Chondrites, Earth Crust, Haiti

Scientific paper

Tektite-like glasses preserved at the Cretaceous/Tertiary boundary at Beloc in Haiti provide clear evidence of an impact event. The glass composition suggests that the impact occurred on a continental shelf region, generating a silica-rich glass with chemical composition that reflects the melting of continental crustal rocks, and a calcium-rich glass produced by the fusion of marl sediments. These findings indicate that catastrophic release to the atmosphere of 10 to the 15th moles of CO2 from vaporized marl occurred during the impact.

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