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BOTÂNICA • Acta Amaz. 6 (3) • Sept 1976 • https://doi.org/10.1590/1809-43921976063293   copy

Some palaeoecological data from Rondonia, southern part of the Amazon Basin. (* * — This research was initiated at Hugo de Vries Laboratory of Amsterdam with a grant of the Dutch government and carried out in the Instituto Nacional de Pesquisas da Amazônia. )

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Abstract

Palynological investigations on sediment cores from three localities in Rondonia in the southern part of the Amazon Basin, indicate that marked vegetational changes have ocurred there. The series of samples from Katira represents the late Cenozoic, probably Quaternary. The sediments from Capoeira might be partly of Holocene age (and possibly Upper Pleistocene as well). Apparently the climatic changes during several intervals of the Late Cenozoic (Quaternary) caused the development of savannas in this region which is now covered in tropical forest.

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