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    Age of depositional and weathering events in Central Amazonia
    (Pergamon-Elsevier Science Ltd, 2017) Sant'Anna, Lucy Gomes; Soares, Emilio Alberto do Amaral; Riccomini, Claudio; Tatumi, Sonia Hatsue [UNIFESP]; Yee, Márcio [UNIFESP]
    In the last three decades, several studies have been devoted to understanding the role of Late Pleistocene Holocene climate changes in the Amazonia lowlands environment. However, most of these studies used data obtained from sedimentary deposits (lakes, swamps, and colluvium) located away from the central plain or on the edges of the Amazonia region. This article integrates optically stimulated luminescence and accelerated mass spectrometry C-14 ages with sedimentological and geomorphological data obtained during this study or compiled from the literature for fluvial and lacustrine deposits of the central alluvial plain of the Solimoes-Amazon River. The age data allow us to present a chronological framework for the Late Pleistocene Holocene deposits and conclude that (i) the dryness of the LGM in central Amazonia lowlands is recorded by the formation of fluvial terraces and their weathering to pedogenic hematite between 25.3 ka and 17.7 ka