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| OLIVEIRA,EMILIANO C.; ROSSETTI,DILCE F.; UTIDA,GISELLE. |
| ABSTRACT This paper presents a sedimentological and stratigraphical study of Quaternary (Middle to Late Pleistocene/Holocene) continental carbonates outcrops inside Pantanal Basin and its surroundings, especially in Serra da Bodoquena, Pantanal do Miranda and Corumbá/Ladário plateau, in the state of Mato Grosso do Sul, as well as in Serra das Araras, in the state of Mato Grosso. The aim is to understand the depositional paleoenvironments and analyse climate and tectonic influences in their genesis and evolution. The results show that the deposition of these continental carbonates started in the Middle to Late Pleistocene and have continued, with some interruptions, until the present days. Sedimentary successions were identified in the different areas,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Central Brazil; Continental carbonates; Holocene; Paleoenvironments; Pantanal Basin; Pleistocene. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200407 |
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| SOUZA,LENA S.B.; ROSSETTI,DILCE F.; ELIAS,VAGNER R.; PRADO,RENATO L.. |
| Studies suggest that the Marajó Island has experienced neotectonic activity during its latest evolution. However, there are no data demonstrating the presence of tectonic structures in its shallow subsurface. This work integrates vertical electric sounding, morphostructural lineaments, and geological data aiming to show fault control on the Late Pleistocene-Holocene sedimentation of this area. Resistivity values were related to mud (< 90 Ωm), clayey sand (90 and 200 Ωm), sand (200 and 500 Ωm), as well as Fe-bearing sand and laterite (> 500 Ωm). The latest values were related to the unconformity with lateritic paleosol at the top of the Barreiras Formation. Despite the values ≤ 500 Ωm of both the Barreiras Formation and the Late Pleistocene-Holocene... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vertical electric sounding; Faults; Quaternary; Marajó Island; Remote sensing. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100073 |
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| ROSSETTI,DILCE F.; MOULATLET,GABRIEL M.; TUOMISTO,HANNA; GRIBEL,ROGÉRIO; TOLEDO,PETER M.; VALERIANO,MÁRCIO M.; RUOKOLAINEN,KALLE; COHEN,MARCELO C.L.; CORDEIRO,CARLOS L.O.; RENNÓ,CAMILO D.; COELHO,LUIZ S.; FERREIRA,CARLOS A.C.. |
| Abstract: What controls the formation of patchy substrates of white sand vegetation in the Amazonian lowlands is still unclear. This research integrated the geological history and plant inventories of a white sand vegetation patch confined to one large fan-shaped sandy substrate of northern Amazonia, which is related to a megafan environment. We examined floristic patterns to determine whether abundant species are more often generalists than the rarer one, by comparing the megafan environments and older basement rocks. We also investigated the pattern of species accumulation as a function of increasing sampling effort. All plant groups recorded a high proportion of generalist species on the megafan sediments compared to older basement rocks. The vegetation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian wetlands; Geological history; Late Pleistocene-Holocene; Megafan sedimentary dynamics; White sand vegetation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700503 |
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