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Miocene flooding events of western Amazonia Jaramillo, C.; Romero, I.; D’Apolito, C.; Bayona, G.; Duarte, E.; Louwye, S.; Escobar, J.; Luque, J.; Carrillo-Briceño, J.D.; Zapata, V.; Mora, A.; Schouten, S.; Zavada, M.; Harrington, G.; Ortiz, J.; Wesselingh, F.P. (2017). Miocene flooding events of western Amazonia. Science Advances 3(5): e1601693. https://dx.doi.org/10.1126/sciadv.1601693 Bijhorende data: https://advances.sciencemag.org/content/3/5/e1601693/tab-figures-data In: Science Advances. AAAS: New York. e-ISSN 2375-2548

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Beschikbaar in	Auteurs
VLIZ: Open access 314584 [ download pdf ]

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Auteurs		Top
Jaramillo, C. Romero, I. D’Apolito, C. Bayona, G. Duarte, E. Louwye, S.	Escobar, J. Luque, J. Carrillo-Briceño, J.D. Zapata, V. Mora, A.	Schouten, S. Zavada, M. Harrington, G. Ortiz, J. Wesselingh, F.P.

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Abstract

There is a considerable controversy about whether western Amazonia was ever covered by marine waters during theMiocene [23 to 5 Ma (million years ago)]. We investigated the possible occurrence of Miocene marine incursions in theLlanos and Amazonas/Solimões basins, using sedimentological and palynological data from two sediment cores taken ineastern Colombia and northwestern Braziltogether with seismic information. We observed two distinct marine intervalsin the Llanos Basin, an early Miocene that lasted ~0.9 My (million years) (18.1 to 17.2 Ma) and a middle Miocene that lasted~3.7 My (16.1 to 12.4 Ma). These two marine intervals are alsoseen in Amazonas/Solimões Basin (northwestern Amazonia)but were much shorter in duration, ~0.2 My (18.0 to 17.8 Ma) and ~0.4 My (14.1 to 13.7 Ma), respectively. Our resultsindicate that shallow marine waters covered the region at least twice during the Miocene, but the events were short-lived, rather than a continuous full-marine occupancy of Amazonian landscape over millions of years

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