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Book Chapter

K/T Boundary Deposits in the Paleo-western Caribbean Basin

By
Ryuji Tada
Ryuji Tada
Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan
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Manuel A. Iturralde-Vinent
Manuel A. Iturralde-Vinent
Museo Nacional de Historia Natural, Havana, Cuba
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Takafumi Matsui
Takafumi Matsui
Department of Complexity Science and Engineering, Graduate School of Frontier Science, University of Tokyo, Japan
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Eiichi Tajika
Eiichi Tajika
Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan
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Tatsuo Oji
Tatsuo Oji
Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan
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Kazuhisa Goto
Kazuhisa Goto
Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan
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Yoichiro Nakano
Yoichiro Nakano
Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan
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Hideo Takayama
Hideo Takayama
Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan
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Shinji Yamamoto
Shinji Yamamoto
Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan
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Shoichi Kiyokawa
Shoichi Kiyokawa
Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University, Fukuoka, Japan
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Kazuhiro Toyoda
Kazuhiro Toyoda
Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Japan
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Dora García-Delgado
Dora García-Delgado
Instituto de Geologia y Paleontologia, Havana, Cuba
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Consuelo Díaz-Otero
Consuelo Díaz-Otero
Instituto de Geologia y Paleontologia, Havana, Cuba
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Reinaldo Rojas-Consuegra
Reinaldo Rojas-Consuegra
Museo Nacional de Historia Natural, Havana, Cuba
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Published:
January 01, 2003

Abstract

A thick, calcareous, clastic megabed of late Maastrichtian age has been known for sometime in western and central Cuba. This megabed was formed in association with the bolide impact at Chicxulub, Yucatán, at the K/T boundary, andiscomposed of a lower gravity-flow unit and an upper homogenite unit. The lower gravity-flow unit is dominantly composed of calcirudite that was formed because of collapses of the Yucatán, Cuban, and Bahamian platform margins and subsequent accumulation in the lower slope to basin margin environment. The gravity flow probably was triggered by a seismic wave induced by the impact, although a ballistic flow may have triggered collapse in the case of proximal sites (Yucatán margin). The upper homogenite unit is composed of massive and normally graded calcarenite to calcilutite that was formed as a result of large tsunamis associated with the impact and deposited in wider areas in the deeper part of Paleo-western Caribbean basin. Slight grain-size oscillations in this unit probably reflect the influence of repeated tsunamis. The large tsunamis were generated either by the movement of water into and out of the crater cavity or by the large-scale slope failure on the eastern margin of the Yucatán platform. In upper slope to shelf environments, gravity-flow deposits and homogenite are absent, and a thin sandstone complex influenced by repeating tsunami waves was deposited.

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Contents

AAPG Memoir

The Circum-Gulf of Mexico and the Caribbean: Hydrocarbon Habitats, Basin Formation and Plate Tectonics

Claudio Bartolini
Claudio Bartolini
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Richard T. Buffler
Richard T. Buffler
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Jon F. Blickwede
Jon F. Blickwede
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American Association of Petroleum Geologists
Volume
79
ISBN electronic:
9781629810546
Publication date:
January 01, 2003

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