Poster-ANASTACIO 51 CBG

Tumaco is a frontier basin located on the SW Colombian Pacific coast. It is composed of a thick siliciclastic sequence up to reach 10,000 m-thick. In recent years, the National Hydrocarbon Agency-ANH has promoted new exploration wells in order to understand the sedimentary dynamic and its relationship with petroleum systems. One of them, the ANH-Tumaco-1-ST-P well has~3000 m (12,000 feet). We carried out sedimentological, geochemical, and micropaleontological detailed analyses with special attention to the ichnology on a 55 m-cored interval (from 1695.3 to 1640.4 m ¼ 5563e5382 ft) in order to assess paleoenvironmental conditions. Beds are composed of green and gray mudrocks interbedded with lithic sandstones and fine-grained tuffs. Calcareous microfossil assemblages defined by the recovery of Uvigerina carapitana, Uvigerina laviculata, Uvigerina pigmaea, Globigerina woodi, Globigerionoides obliquus, Discoaster bellus gr., Catinaster coalitus, Reticulofenestra pseudoumbilicus and Sphenolithus abies indicated a Tortonian age, between CN6/CN7 biozones. Six sedimentary facies were identified: (1, 2) massive and laminated mudrocks, (3, 4) massive and normal-graded sandstones, (5) heterolithic beds, and in some cases (6) sandstones with soft-deformation structures. These rocks were accumulated in a shallowing platform-prodelta environment with continuous volcanic influence. Ichnotaxonomic analysis, conducted for the first time in the Colombian Pacific, allowed the identification of eighteen ichnogenera: Alcyoni-Zoophycos. The ichnological association belongs to the archetypal Cruziana ichnofacies and its "distal" expression. By integrating lithofacies and ichnological results, two segments have been distinguished: 1) the lower one (1695.3e1677.1 m) dominated by massive and laminated mudrocks and 1 to 6 ichnofabric indexes and, 2) the upper segment (1677.1e1640.4 m) characterized by the increase of the sandstone facies, and ichnofabric indexes from 1 to 5. Along these segments, four ichnofabrics have been identified: 1) Phycosiphon-Planolites, 2) Planolites-Thalassinoides, 3) Zoophycos-Chondrites, and 4) Phycosiphon-Thalassinoides, reflecting stable sedimentary conditions with lowmoderate energy, low-moderate sedimentation rates, and dominant aerobic facies. Minor variations in these parameters (sedimentation rate, energy conditions, substrate consistency, oxygenation and organic matter), however, induced changes in the macrobenthic tracemaker community, and consequently in the registered trace fossil assemblages.

2009

The Adamantina Formation deposits (Upper Cretaceous) from the Bauru Basin, in southwestern São Paulo State, have revealed an extraordinary and well preserved assemblage of fossil turtles. In this contribution some new unique findings from these deposits and the Bauru Basin, are reported and discussed. Additionally, some peculiar sedimentary structures, as a bone fragment crossing two sedimentary layers, associated with the fossils, are described and biostratinomic considerations regarding these materials are made. The turtle remains from the studied outcrop have undergone short subaerial exposure and transport, being quickly buried. It was also verified that the time elapsed between these sedimentary episodes, in one of the samples, was almost instantaneous.

2017

The aim of this paper is to focus the importance of dialog between outcrops morphology and prehistoric motifs engraved or inscribed in them. Altogether, these elements form a well-adapted methodology that contributes to interpretation of rock art and prehistoric landscapes. The theoretical framework was based in the landscape assumptions proposed by C. Tilley (2002): " physical " world is not simply made of inert things, but full of significant properties that matter to its inhabitants. In this sense, outcrops and their forms were not simple surfaces to carve, but acting agents that added meanings to these rock art places and stories to tell for posterity. The rock engravings of Crastoeiro (Mondim de Bastos) and Lage dos Sinais/Monte do Olheiro (Barcelos) form the first and second case studies. In both cases there appears to be an inter and deep relationship between the topography of the engraved outcrops and the topography where they are located. By the arrangement of the motifs in the outcrops, both cases evidence intentional will to influence how to look to the slopes and ridges of both hills, probably of great symbolism during the past. The third case study is Santo Adrião, in the parish of Âncora (Caminha). In this case, either the orientation of the slope of the outcrop and the engraved weapons indicate a narrative of blind and passive deposition of weapons. A fourth case study, which clearly illustrates these assumptions, is Fornelos, in the parish of Carreço (Viana do Castelo). In different panels, several equines, horsemen, a dog, and an anthropomorphic were engraved. The space chosen for the carvings of these signs, the orientation of motifs, the topography of the outcrop and its coloration create an impressive scenic effect for its audience. At the same time, all these elements appear to tell a real or a mythical narrative, 2 where horses and horsemen seem to have travelled a certain path-narrowed, poorly lighted, and limited – from where only a few would return. A fifth case study consists in the different outcrops engraved with footprints identified at Monte de São Romão (Guimarães). Here, the orientation of footprints, and their dialogue with the outcrops orientations suggest certain paths, related to some kind of symbolic interpretation. During the difficult task of interpreting past landscape, it is important to think in outcrops not as simple carving surfaces, but as active elements in the surroundings, already bearers of stories and senses in the landscape, resulting from the complex social structures and, at the same time, acting as actors in between that structure.

2016

(DBio-UFSCAR), who have both become great friends while advising me in my dissertation. Their humility and dedication are inspiring; their passion for Science is contagious; and their willingness to give students freedom of thought is fruitful. I have always had invaluable help during my research and own them my academic growth. I acknowledge the Brazilian Council for Scientific and Technological Development (Process 154062/2014-6) for having provided my masters scholarship, and the Post-Graduation Program in Geochemistry and Geotectonics of the Institute of Geosciences of the University of São Paulo for logistics and financial support. I also thank the post-graduation secretaries for full support during my masters. My sincere thanks also goes to Professor Thomas Rich Fairchild (IGc-USP), whose witty comments and sharp criticism make research routine lighter but, nevertheless, a high-quality enterprise. Professor Luiz Eduardo Anelli (IGc-USP) has always inspired me with insightful discussions. I also thank Professor Juliana Moraes de Leme Basso and Professor Paulo Eduardo de Oliveira (both from the IGc-USP) for having provided classroom assistant scholarships, and Ivone Cardoso Gonzales, Josefa Francisca Ferreira and all trainees of the Palaeontological Scientific Collection of the IGc-USP for their prompt help with infrastructure issues, facilitating research activities enormously. Samuel "Samuca" has always helped in dangerous rock cutting and Renato Carvalho in skilful thin-section preparation. I am also very grateful to Prof. Dr. Marcia de Almeida Rizzutto (IF-USP), Dr. Douglas Galante (LNLS), Prof. Dr. Fabio Rodrigues (IQ-USP), Prof. Dr. Adriana de Oliveira Delgado (UFSCAR), Rafael Parra Ribeiro (UNESP Sorocaba), and Prof. Dr. Elidiane Rangel (UNESP Sorocaba), who have made a great effort in both teaching and helping me with analytical techniques since the very early stages of my research. I am thankful to Izabel Ladeira ("English for You") for language revision, to Professor Mario Luis Assine (IGCE-UNESP), who have kindly provided a vectorized version of a map of the Araripe Basin, and to Bruno Becker Kerber (PPGERN-UFSCAR) for the palaeoenvironmental diagram of the Crato palaeolake. I would like to thank my family, including my parents Ana and Julio, my brothers Guilherme and Mariana, my aunts Amália and Izabel, my uncle Hugo, and my grandmothers Lourdes and Rosa, for their kindness, inspiration and support throughout my life.

Paleontological collections of type specimens housed in museums represent a significant database for the scientific community. To be easily available for researchers worldwide, these collections should be well-organized, curated and recorded in online databases. The first step towards a comprehensive understanding of the type collections stored in our museum consists in drafting the catalogue of fossil type specimens. Such a comprehensive listing of type specimens of fossil plantae, invertebrates and vertebrates, currently registered in the collections of the Museum of Paleontology-Stratigraphy, Babeş-Bolyai University, Cluj-Napoca (MPS-BBU-CN) is presented here.

The aim of this paper is to focus the importance of dialog between outcrops morphology and prehistoric motifs engraved or inscribed in them. Altogether, these elements form a well-adapted methodology that contributes to interpretation of rock art and prehistoric landscapes. The theoretical framework was based in the landscape assumptions proposed by C. Tilley (2002): " physical " world is not simply made of inert things, but full of significant properties that matter to its inhabitants. In this sense, outcrops and their forms were not simple surfaces to carve, but acting agents that added meanings to these rock art places and stories to tell for posterity. The rock engravings of Crastoeiro (Mondim de Bastos) and Lage dos Sinais/Monte do Olheiro (Barcelos) form the first and second case studies. In both cases there appears to be an inter and deep relationship between the topography of the engraved outcrops and the topography where they are located. By the arrangement of the motifs in the outcrops, both cases evidence intentional will to influence how to look to the slopes and ridges of both hills, probably of great symbolism during the past. The third case study is Santo Adrião, in the parish of Âncora (Caminha). In this case, either the orientation of the slope of the outcrop and the engraved weapons indicate a narrative of blind and passive deposition of weapons. A fourth case study, which clearly illustrates these assumptions, is Fornelos, in the parish of Carreço (Viana do Castelo). In different panels, several equines, horsemen, a dog, and an anthropomorphic were engraved. The space chosen for the carvings of these signs, the orientation of motifs, the topography of the outcrop and its coloration create an impressive scenic effect for its audience. At the same time, all these elements appear to tell a real or a mythical narrative, 2 where horses and horsemen seem to have travelled a certain path-narrowed, poorly lighted, and limited – from where only a few would return. A fifth case study consists in the different outcrops engraved with footprints identified at Monte de São Romão (Guimarães). Here, the orientation of footprints, and their dialogue with the outcrops orientations suggest certain paths, related to some kind of symbolic interpretation. During the difficult task of interpreting past landscape, it is important to think in outcrops not as simple carving surfaces, but as active elements in the surroundings, already bearers of stories and senses in the landscape, resulting from the complex social structures and, at the same time, acting as actors in between that structure.

Nature/Scientific Reports , 2024

The Serrote do Letreiro Site, found on the northwest periphery of the Sousa Basin, Brazil, presents a remarkable convergence of paleontological and archaeological elements. It is constituted of subhorizontal "lajeiros", or rock outcrops, intermingled with endemic Caatinga vegetation. The three prominent outcrops feature fossilized footprints of theropod, sauropod, and iguanodontian dinosaurs from the Early Cretaceous Period. Adjacent to these dinosaur tracks, indigenous petroglyphs adorn the surface. The petroglyphs, mainly characterized by circular motifs, maintain a striking resemblance to other petroglyphs found in the states of Paraíba and Rio Grande do Norte. This study primarily endeavors to delineate the site's major characteristics while concentrating on the relationship between the dinosaur footprints and the petroglyphs. It concurrently assesses the preservation status of this invaluable record, shedding light on its implications for the realms of paleontology, archaeology, and cultural heritage studies.