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KT boundary impact glasses from the Gulf of Mexico regionCretaceous-Tertiary boundary (KTB) tektite glasses occur at several sites around the Gulf of Mexico. Contrary to rumor among KTB workers, glass fragments have been found by several researchers in the base of the spherule bed at Arroyo el Mimbral in NE Mexico. The presence of green, red, and transparent glass fragments at Mimbral only, demonstrates that the Mimbral glass is not a laboratory contamination by Beloc glass. The chemistry and ages of the glass are consistent with an origin from the Chixculub impact crater in Yucatan. No evidence supports a volcanic origin for the KTB glasses. A discussion of tektite glass from the KT boundary is presented.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Claeys, Philippe
(California Univ. Davis, CA, United States)
Alvarez, Walter
(California Univ. Berkeley., United States)
Smit, Jan
(Vrije Univ. Amsterdam, Netherlands)
Hildebrand, A. R.
(Geological Survey of Canada Ottawa, Ontario., Canada)
Montanari, Alessandro
(Osservatorio Geologico di Coldigioco Aprio, Italy)
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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