The role of Late Pleistocene-Holocene tectono-sedimentary history on the origin of patches of savanna vegetation in the middle Madeira River, southwest of the Amazonian lowlands
| Autor: | Rogério Gribel, Dilce de Fátima Rossetti, Marcelo Cancela Lisboa Cohen, Márcio Yee, Sonia Hatsue Tatumi, Márcio de Morisson Valeriano |
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| Rok vydání: | 2019 |
| Předmět: |
010506 paleontology
Pleistocene Amazon rainforest Amazonian Paleontology Rainforest Vegetation 010502 geochemistry & geophysics Oceanography 01 natural sciences Floristics Sedimentary rock Physical geography Ecology Evolution Behavior and Systematics Holocene Geology 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Palaeogeography, Palaeoclimatology, Palaeoecology. 526:136-156 |
| ISSN: | 0031-0182 |
| Popis: | Savanna patches are features of the Amazonian landscape that have been long under intense debate, but there are still questions about the main factors that have determined their establishment and evolution within the rainforest matrix. In particular, their geological substrates were poorly documented. The aim of this work is to reconstruct the tectono-sedimentary history of four savanna patches in the middle Madeira River, southwest Amazonia, and discuss its potential control over the development of the savanna communities. The approach consisted in the integration of geomorphological, sedimentological, chronological and floristic data. The results revealed that the savanna substrates are sandy deposits aged between 118.9 and 35.6 ky, overlain by late Pleistocene to Holocene muddier successions |
| Databáze: | OpenAIRE |
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