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Stratigraphy and sedimentology of the K/T boundary deposit in HaitiThe K/T boundary sequence is exposed in uplifted carbonate sediments of the southwest peninsula of Haiti. It is found at 15 localities within the Beloc formation, a sequence of limestone and marls interpreted as a monoclinal nappe structure thrust to the north. This tectonic deformation has affected the K/T boundary deposit to varying degrees. In some cases the less competent K/T deposit has acted as a slip plane leading to extensive shearing of the boundary layer, as well as duplication of the section. The presence of glassy tektites, shocked quartz, and an Ir anomaly directly link the deposit to a bolide impact. Stratigraphic and sedimentological features of the tripartite sequence indicate that it was formed by deposition from ballistic fallout of coarse tektites, emplacement of particle gravity flows and fine grained fallout of widely dispersed impact ejecta.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Carey, S.
(Rhode Island Univ. Narragansett, RI, United States)
Sigurdsson, H.
(Rhode Island Univ. Narragansett, RI, United States)
Dhondt, S.
(Rhode Island Univ. Narragansett, RI, United States)
Espindola, J. M.
(Universidad Nacional Autonoma de Mexico Mexico City., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F
Subject Category
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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