Miocene flooding events of western Amazonia

Science Advances
Carlos JaramilloFrank P Wesselingh

Abstract

There is a considerable controversy about whether western Amazonia was ever covered by marine waters during the Miocene [23 to 5 Ma (million years ago)]. We investigated the possible occurrence of Miocene marine incursions in the Llanos and Amazonas/Solimões basins, using sedimentological and palynological data from two sediment cores taken in eastern Colombia and northwestern Brazil together with seismic information. We observed two distinct marine intervals in 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 also seen 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 results indicate 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.

Associated Datasets

Nov 21, 2016·Michael ZavadaCarlos D'Apolito

References

Apr 12, 2001·Proceedings. Biological Sciences·H HamiltonR L Brownell
Apr 1, 2006·Science·Carlos JaramilloGermán Mora
Jan 12, 2007·The Behavioral and Brain Sciences·John L Locke, Barry Bogin
Jul 21, 1995·Science·M E RäsänenF R Negri
Jan 1, 2009·Language Learning and Development : the Official Journal of the Society for Language Development·Daniel J WeissAaron D Mitchel
Feb 27, 2015·Proceedings. Biological Sciences·Rodolfo Salas-GismondiPierre-Olivier Antoine
Aug 1, 2011·Journal of South American Earth Sciences·Martin GrossJackson Douglas da Silva Paz

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Citations

Sep 20, 2019·Science Advances·Thierry OberdorffJansen Zuanon
Oct 13, 2018·PeerJ·Alexandre AntonelliScott V Edwards
Oct 25, 2020·Proceedings of the National Academy of Sciences of the United States of America·Ingrid C RomeroSurangi W Punyasena
Mar 5, 2021·Proceedings of the National Academy of Sciences of the United States of America·Amy McDermott
Apr 3, 2021·Science·Mónica R CarvalhoDaniele Silvestro
Jul 12, 2020·Journal of Human Evolution·Laurent MarivauxPierre-Olivier Antoine

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Software Mentioned

R for Statistical Computing
SDAR
GraphCor
R
GPlates

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