Kathleen S. Gersie
(Department of Geosciences, Anton de Kom University of Suriname, Leysweg 86, Paramaribo, Suriname)
The Suriname coastline, as part of the Guianas is characterized by westward migrating mudflats formed by Amazon River sediments. In this study we did palaeoenvironmental and vegetation analysis of the Suriname coast. We analysed samples from the nearshore Powisi-01 well and determined the palynological and geochemical composition of these sediments. Two main palynological zones and six subzones were identified. The lower zone consists of palynomorphs of Late Paleocene to earliest Eocene age occur, including palms and other angiosperms. The Paleocene-Eocene Thermal Maximum (PETM), is also detected in this section part. A barren section follows, that is overlain by Early Miocene, and Middle/Late Miocene to Pleistocene sediments. Palynological diversity is high throughout the well section, and pointing at a tropical lowland flora in the hinterland. Geochemical compositions further indicate that sediments are mainly of cratonic provenance, with the top at c. 200 mbsl of the section presenting a mixed sediment signal of Andean/Amazon, Orinoco, and Amazon craton-derived sediments. Regional studies indicate that Andean sediments likely reached the Guiana coastline during the Late Miocene, but more research is required to determine exactly when the Amazon River began influencing the Guianas coastline.
Kathleen S. Gersie
(Department of Geosciences, Anton de Kom University of Suriname, Leysweg 86, Paramaribo, Suriname)
Angelo Plata Torres
(Instituto de Investigaciones en Estratigrafía (IIES), Grupo de Investigaciones en Estratigrafía y Vulcanología (GIEV-Cumanday) y Departamento de Ciencias Geológicas, Universidad de Caldas, Calle 65 # 26-10, Manizales, Colombia)
Carina Hoorn
(Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, The Netherlands)
Elton Luiz Dantas
(Labaratório de Geocronologia, Instituto de Geociências, Universidade de Brasilia, Brasilia)
Hanna van den Hil
(Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, The Netherlands)
Henry Hooghiemstra
(Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, The Netherlands)
Kenneth F. Rijsdijk
(Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, The Netherlands)
Martin Roddaz
(Géosciences-Environnement Toulouse, Université de Toulouse; UPS (SVT-OMP); CNRS; IRD; 14 Avenue Édouard Belin, F-31400 Toulouse, France)
Raul Giovanni Bogotá-Angel
(Facultad del Medio Ambiente y Recursos Naturales, Universidad Distrital Francisco José de Caldas, Bogotá D.C. Colombia)
Roberto Ventura Santos
Roel Verreussel
(TNO Research Institute, Princetonlaan 6, 3584CB, Utrecht, The Netherlands)
Ronald T. van Balen
(Department of Earth Sciences, VU University of Amsterdam, De Boelelaan 1100, 1081HZ, Amsterdam, The Netherlands)
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