Complex tsunami waves suggested by the Cretaceous-Tertiary boundary deposit at the Moncada section, western Cuba

R. Tada, Y. Nakano, M. A. Iturralde-Vinent, S. Yamamoto, T. Kamata, E. Tajika, K. Toyoda, S. Kiyokawa, D. Garcia Delgado, T. Oji, K. Goto, H. Takayama, R. Rojas-Consuegra, T. Matsui

Research output: Contribution to journalArticle

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Abstract

The Moncada Formation in western Cuba is an ∼2-m-thick weakly metamorphosed complex characterized by repetition of calcareous sandstone units that show overall upward fining and thinning. The Moncada Formation contains abundant shocked quartz, altered vesicular impact-melt fragments, and altered and deformed greenish grains of possible impact glass origin. In addition, a high iridium (∼0.8 ppb) peak is identified at the top of the formation. Together with the biostratigraphically estimated age, between late Maastrichtian and early Paleocene, this evidence supports a Cretaceous-Tertiary (K-T) boundary origin for the deposit. The Moncada Formation has ripple cross-laminations at several horizons that indicate north-south-trending paleocurrent directions with reversals. Changes in detrital provenance corresponding to paleocurrent reversals are also recognized. These characteristics are similar to K-T boundary sandstone complexes reported from the Gulf of Mexico region, and strongly support a K-T boundary tsunami origin for the Moncada Formation. The pattern of paleocurrent reversals in the Moncada Formation suggests that tsunami waves were not simple alternations of a single beat, but rather alternations of double beats following the first wave that came from the south. In addition, the maximum grain-size variation within each unit suggests the presence of higher frequency waves superimposed on the lower frequency waves. Thus, our results suggest that K-T impact tsunami waves had a complex rhythm that was caused either by reflections and diffractions of waves or by multiple tsunami waves created by multiple gravity-flows triggered by seismic shocks of the impact.

Original languageEnglish
Pages (from-to)109-123
Number of pages15
JournalSpecial Paper of the Geological Society of America
Volume356
DOIs
Publication statusPublished - Jan 1 2002

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tsunami
paleocurrent
sandstone
iridium
gravity flow
lamination
ripple
Maastrichtian
Paleocene
diffraction
provenance
thinning
grain size
glass
melt
quartz

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

Complex tsunami waves suggested by the Cretaceous-Tertiary boundary deposit at the Moncada section, western Cuba. / Tada, R.; Nakano, Y.; Iturralde-Vinent, M. A.; Yamamoto, S.; Kamata, T.; Tajika, E.; Toyoda, K.; Kiyokawa, S.; Garcia Delgado, D.; Oji, T.; Goto, K.; Takayama, H.; Rojas-Consuegra, R.; Matsui, T.

In: Special Paper of the Geological Society of America, Vol. 356, 01.01.2002, p. 109-123.

Research output: Contribution to journalArticle

Tada, R, Nakano, Y, Iturralde-Vinent, MA, Yamamoto, S, Kamata, T, Tajika, E, Toyoda, K, Kiyokawa, S, Garcia Delgado, D, Oji, T, Goto, K, Takayama, H, Rojas-Consuegra, R & Matsui, T 2002, 'Complex tsunami waves suggested by the Cretaceous-Tertiary boundary deposit at the Moncada section, western Cuba', Special Paper of the Geological Society of America, vol. 356, pp. 109-123. https://doi.org/10.1130/0-8137-2356-6.109
Tada, R. ; Nakano, Y. ; Iturralde-Vinent, M. A. ; Yamamoto, S. ; Kamata, T. ; Tajika, E. ; Toyoda, K. ; Kiyokawa, S. ; Garcia Delgado, D. ; Oji, T. ; Goto, K. ; Takayama, H. ; Rojas-Consuegra, R. ; Matsui, T. / Complex tsunami waves suggested by the Cretaceous-Tertiary boundary deposit at the Moncada section, western Cuba. In: Special Paper of the Geological Society of America. 2002 ; Vol. 356. pp. 109-123.
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abstract = "The Moncada Formation in western Cuba is an ∼2-m-thick weakly metamorphosed complex characterized by repetition of calcareous sandstone units that show overall upward fining and thinning. The Moncada Formation contains abundant shocked quartz, altered vesicular impact-melt fragments, and altered and deformed greenish grains of possible impact glass origin. In addition, a high iridium (∼0.8 ppb) peak is identified at the top of the formation. Together with the biostratigraphically estimated age, between late Maastrichtian and early Paleocene, this evidence supports a Cretaceous-Tertiary (K-T) boundary origin for the deposit. The Moncada Formation has ripple cross-laminations at several horizons that indicate north-south-trending paleocurrent directions with reversals. Changes in detrital provenance corresponding to paleocurrent reversals are also recognized. These characteristics are similar to K-T boundary sandstone complexes reported from the Gulf of Mexico region, and strongly support a K-T boundary tsunami origin for the Moncada Formation. The pattern of paleocurrent reversals in the Moncada Formation suggests that tsunami waves were not simple alternations of a single beat, but rather alternations of double beats following the first wave that came from the south. In addition, the maximum grain-size variation within each unit suggests the presence of higher frequency waves superimposed on the lower frequency waves. Thus, our results suggest that K-T impact tsunami waves had a complex rhythm that was caused either by reflections and diffractions of waves or by multiple tsunami waves created by multiple gravity-flows triggered by seismic shocks of the impact.",
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T1 - Complex tsunami waves suggested by the Cretaceous-Tertiary boundary deposit at the Moncada section, western Cuba

AU - Tada, R.

AU - Nakano, Y.

AU - Iturralde-Vinent, M. A.

AU - Yamamoto, S.

AU - Kamata, T.

AU - Tajika, E.

AU - Toyoda, K.

AU - Kiyokawa, S.

AU - Garcia Delgado, D.

AU - Oji, T.

AU - Goto, K.

AU - Takayama, H.

AU - Rojas-Consuegra, R.

AU - Matsui, T.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - The Moncada Formation in western Cuba is an ∼2-m-thick weakly metamorphosed complex characterized by repetition of calcareous sandstone units that show overall upward fining and thinning. The Moncada Formation contains abundant shocked quartz, altered vesicular impact-melt fragments, and altered and deformed greenish grains of possible impact glass origin. In addition, a high iridium (∼0.8 ppb) peak is identified at the top of the formation. Together with the biostratigraphically estimated age, between late Maastrichtian and early Paleocene, this evidence supports a Cretaceous-Tertiary (K-T) boundary origin for the deposit. The Moncada Formation has ripple cross-laminations at several horizons that indicate north-south-trending paleocurrent directions with reversals. Changes in detrital provenance corresponding to paleocurrent reversals are also recognized. These characteristics are similar to K-T boundary sandstone complexes reported from the Gulf of Mexico region, and strongly support a K-T boundary tsunami origin for the Moncada Formation. The pattern of paleocurrent reversals in the Moncada Formation suggests that tsunami waves were not simple alternations of a single beat, but rather alternations of double beats following the first wave that came from the south. In addition, the maximum grain-size variation within each unit suggests the presence of higher frequency waves superimposed on the lower frequency waves. Thus, our results suggest that K-T impact tsunami waves had a complex rhythm that was caused either by reflections and diffractions of waves or by multiple tsunami waves created by multiple gravity-flows triggered by seismic shocks of the impact.

AB - The Moncada Formation in western Cuba is an ∼2-m-thick weakly metamorphosed complex characterized by repetition of calcareous sandstone units that show overall upward fining and thinning. The Moncada Formation contains abundant shocked quartz, altered vesicular impact-melt fragments, and altered and deformed greenish grains of possible impact glass origin. In addition, a high iridium (∼0.8 ppb) peak is identified at the top of the formation. Together with the biostratigraphically estimated age, between late Maastrichtian and early Paleocene, this evidence supports a Cretaceous-Tertiary (K-T) boundary origin for the deposit. The Moncada Formation has ripple cross-laminations at several horizons that indicate north-south-trending paleocurrent directions with reversals. Changes in detrital provenance corresponding to paleocurrent reversals are also recognized. These characteristics are similar to K-T boundary sandstone complexes reported from the Gulf of Mexico region, and strongly support a K-T boundary tsunami origin for the Moncada Formation. The pattern of paleocurrent reversals in the Moncada Formation suggests that tsunami waves were not simple alternations of a single beat, but rather alternations of double beats following the first wave that came from the south. In addition, the maximum grain-size variation within each unit suggests the presence of higher frequency waves superimposed on the lower frequency waves. Thus, our results suggest that K-T impact tsunami waves had a complex rhythm that was caused either by reflections and diffractions of waves or by multiple tsunami waves created by multiple gravity-flows triggered by seismic shocks of the impact.

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