GLASS FROM THE CRETACEOUS TERTIARY BOUNDARY IN HAITI

Article

关键词: IMPACT EVENT;    RATON BASIN;    NEW-MEXICO;    SM-ND;    RB-SR;    SPHERULES;    COLORADO;    SITE;    EXTINCTIONS;    SYSTEMATICS;   

DOI  :  10.1038/349482a0

来源: SCIE

【 摘 要 】

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(15) moles of CO2 from vaporized marl occurred during the impact.

【 授权许可】

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