Miocene flooding events of western Amazonia

Late Miocene ostracods from the Solimões Formation (Western Amazonia): geochemical and palaeontological analyses

Amber from western Amazonia reveals Neotropical diversity during the middle Miocene.

Tertiary insects and arachnids have been virtually unknown from the vast western Amazonian basin. We report here the discovery of amber from this region containing a diverse fossil arthropod fauna (13 hexapod families and 3 arachnid species) and abundant microfossil inclusions (pollen, spores, algae, and cyanophyceae). This unique fossil assemblage, recovered from middle Miocene deposits of nor...

On the Miocene Cyprideis species flock (Ostracoda; Crustacea) of Western Amazonia (Solimões Formation): Refining taxonomy on species level

The Miocene mega-wetland of western Amazonia holds a diverse, largely endemic ostracod fauna. Among them, especially the genus Cyprideis experienced a remarkable radiation. Micropalaeontologic investigations of a 400 m long sediment core (~62 km SW Benjamin Constant, Amazonia, Brazil) permitted a taxonomic revision of about two-thirds of hitherto described Cyprideis species. We evaluate the dia...

interbasin fluvial system is recorded in the Cretaceous Alter do Chão Formation [3], but with increased Neogene Andean uplift and tectonic subsidence in western Amazonia this regime gave way to isolated sedimentary basins east and west of the Purus

INTRODUCTION Geological evolution of the Amazon Basin. The geological history of lowland Amazonia is still poorly understood, in part because much of the Tertiary stratigraphic history has been removed by erosion and that which remains is difficult to study and access in a rainforest environment. The landscape evolution of Amazonia during the Neogene was influenced mainly by Andean tectonics an...

The nature of aquatic landscapes in the Miocene of western Amazonia: an integrated palaeontological and geochemical approach

Wesselingh, F.P., Kaandorp, R.J.G., Vonhof, H.B., Räsänen, M.E., Renema, W. & Gingras, M. The nature of aquatic landscapes in the Miocene of western Amazonia: an integrated palaeontological and geochemical approach. Scripta Geologica, 133: 363-393, 10 fi gs, 5 tables, 2 appendices, Leiden, November 2006. F.P. Wesselingh, Nationaal Natuurhistorisch Museum, Postbus 9517, 2300 RA Leiden, The Nethe...