A5027051084- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geochemistry and Elemental Analysis
- Geological formations and processes
- Fish biology, ecology, and behavior
- Geography and Environmental Studies
- Geomagnetism and Paleomagnetism Studies
- Groundwater and Isotope Geochemistry
- Astro and Planetary Science
- Marine Biology and Ecology Research
- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Ichthyology and Marine Biology
Valongo Observatory
2024-2025
National Observatory
2024-2025
Universidade de São Paulo
2019-2023
Universidade Federal do Pará
2015-2018
Abstract Clastic sedimentary systems and their characteristics are assumed not to have been modified by carbonate bioclastic grains until the Phanerozoic. Here, we show that presence of bioclasts produced disintegrated biomineralizing metazoans fine-grained siliciclastic facies in Late Ediacaran Tamengo Formation, Brazil, ca. 555–542 Ma. The analysis both polished sections thin shows sand-sized (< 2 mm) derived from metazoan Corumbella created diverse features later found Phanerozoic...
Abstract Mixed carbonate–siliciclastic deposits of the Tamengo Formation (terminal Ediacaran), record rise calcifying metazoans and origin exoskeletons in animals. To explore relationships between environmental setting first appearance calcified their ecology, this study presents detailed sedimentological stratigraphic data eight sections that capture final stages Ediacaran (550 to 543 Ma). This combines characterization with facies descriptions evaluates lateral heterogeneity overall ramp...
Rochas carbonáticas são amplamente registradas na região oeste e centro-oeste do Estado Pará, borda Sul da Bacia Amazonas, correspondentes ao período Neocarbonífero. Esses depósitos incluídos sequência pensilvaniana-permiana correspondente a uma super de segunda ordem representada pelo Grupo Tapajós. A Formação Itaituba corresponde à porção transgressiva que precedeu expressiva continentalização formação Pangeia. Essa unidade é constituída carbonatos fossilíferos, arenito com estratificação...
ABSTRACT: Facies and stratigraphic analysis were carried out in Neoproterozoic-Lower Paleozoic carbonate-siliciclastic deposits of Cacoal Pimenta Bueno formations exposed on basement rocks into the Graben, northwestern portion Parecis Basin, southwesternmost Amazon Craton. The redescription redefinion this succession confirmed previous interpretation for Formation as a Marinoan (~ 635 Ma) cap carbonate. is subdivided here two units separate by sharp contact found exclusively overlying...
&lt;p&gt;The Ediacaran Period (635-542 Ma) witnessed a series of extraordinary events. It arises with the end Marinoan Glaciation and deposition worldwide enigmatic cap carbonate deposits. This abrupt shift in paleoclimatic conditions coincides major fluctuations the&amp;#160; isotope ratios carbon sulfur, significant changes concentration redox-sensitive elements marine sediments. The is also period marked by rapid geomagnetic polarity. Magnetostratigraphy may therefore provide...