Studies of distributive fluvial systems and their preserved successions envisage the distribution and orientation of architectural elements to be primarily controlled by channels radiating outward from fan apices, in many cases along an elongate basin margin. Conceptual models for such systems account for the downstream dynamics of the fluvial network, but with limited consideration of temporal geomorphic variations, resulting vertical organisation of architectural elements, or of the interplay of factors controlling system dynamics. To understand the external and internal architecture of distributive fluvial systems, and the factors that influence their sequential facies organisation, a sedimentary succession of the proximal portion of an Upper Cretaceous, semiarid, distributive fluvial system, located at the northeastern margin of the Bauru Basin (Southeast Brazil), has been analysed in detail. Three fining-and thinning-upward fluvial sequences are identified, forming an interval separated at the top and the bottom by two palaeosol profiles. Each sequence is formed of channel and floodplain deposits. Two types of channel deposits are identified. One is composed of stacked sets of small-scale dune deposits, suggesting perennial and steady fluvial regime, associated with more humid climate periods. The other is composed of large-scale sets indicative of flattened dunes associated with unsteady and fast-changing fluvial flow, formed in quasi-supercritical flow regime conditions, associated with drier climate periods. The vertical alternation of these two types of channel deposits records the accumulation of a fluvial succession that responded to high-frequency, climateinduced cyclic change in bounding conditions. Two palaeosol profiles, at the top and at the bottom of the succession, indicate temporary interruptions and cessation of the fluvial sedimentation, likely related to avulsion of the fluvial belt. Thus, the studied succession reveals high-frequency climateinduced allogenic sedimentary cycles that occur within a long-period autogenic geomorphologicinduced sedimentary cycle. This work suggests that the internal architecture of the channel deposits can be used as a climate proxy, and that climate and geomorphology act jointly as notable factors to control the vertical organisation of distributive fluvial systems.

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dos Anjos CANDEIRO RESUMO Acumulações de fósseis vertebrados encontradas no Grupo Bauru (Neocretáceo) da região do Triângulo Mineiro tradicionalmente têm sido coletadas por meio de métodos de campo tradicionais. Entretanto, a falta de protocolos específicos para a coleta de micro e macrovertebrados tem resultado, por vezes, em conjuntos de dados e interpretações equivocados. A fim de recuperar os fósseis com maior eficácia, utilizou-se no presente estudo um método que envolveu a coleta de rochas, a triagem, a desagregação química, e posterior lavagem. Este método foi aplicado a rochas sedimentares das formações Adamantina e Marília contendo fragmentos fósseis. Os resultados demonstraram que o tratamento químico pode contribuir para uma melhor desagregação da rocha sem danificar as características dos fósseis. A metodologia proposta é passível de aplicação em outras localidades fossilíferas contendo fragmentos de fósseis e microfósseis de vertebrados.Palavras-chave: rochas sedimentares, desagregação química, Grupo Bauru, vertebrados. ABSTRACTAccumulations of vertebrate fossils found in the Bauru Group (Late Cretaceous) of the Triângulo Mineiro region have been traditionally collected by nonstandardized field methods. However, the lack of specific protocols for collecting micro and macrovertebrates has sometimes resulted in questionable datasets and misinterpretations. In order to recover fossils more effectively, in this study we used a method that involves the collection of sediment, gentle chemical disaggregation, and subsequent total screenwashing of a large volume of rocks. This method was applied to sedimentary rocks bearing fossil fragments of the Marília and Adamantina formations. Results show that the chemical treatment can contribute to a better disaggregation of rocks in order to recover small fossil fragments and microfossils without damaging their features. This method can be applied at other localities containing fossil fragments or microfossils of vertebrates.

Titanosaurs are one of the most common dinosaurs found in Cretaceous outcrops, especially in Brazil. In this article we describe a proximal portion of an ulna (Paleo-UFG/V-0039) which was found isolated Paleo-UFG/V-0039 comes from a sandstone outcrop, with fine to medium granulation, of the Marília Formation (Bauru Group) that appears irregularly in the municipality of Gurinhatã, state of Minas Gerais, Brazil. The occurrence described here is the first dinosaur osteological remains documented in this municipality. Although incomplete, Paleo-UFG/V-0039 could be identified as an indeterminate lithostrotian titanosaur whose morphology is similar to some appendicular elements of European species than South American ones. However, the incompleteness of the specimen has difficult complex interpretations. Finally, Paleo-UFG/V-0039 highlights the importance of the Gurinhatã outcrops and other sites in this region for future discoveries.

RESUMOOs inventários florestais consistem em utilizar técnicas de amostragem para obtenção de dados quantitativos e qualitativos de povoamentos florestais. O volume constitui uma das informações de maior importância para o conhecimento do potencial disponível em um povoamento florestal. Existem diversas metodologias de inventários florestais, entretanto, para todas as metodologias é necessário realizar o procedimento de cubagem rigorosa em árvores representativas da floresta para posteriormente determinar o fator de forma médio, o fator razão ou a equação volumétrica que permitira a determinação do volume em pé de todo o povoamento florestal. Dentre as metodologias as equações volumétricas são as melhores e mais recomendadas. Palavras-chave: Fator de Forma Médio, Fator Razão, Equações Volumétricas, Regressão, Cubagem Rigorosa. METHODOLOGIES FOR DETERMINING THE VOLUME OF WOOD STANDING FOR APPLICATION IN FOREST INVENTORY ABSTRACTThe forest inventories consist of using sampling techniques to obtain quantitative and qualitative data of forest stands. The volume is one of the most important information for understanding the potential available in a forest stand. There are several methodologies for forest inventories, however, for all methodologies is necessary to perform the procedure cubed representative trees in the forest to subsequently determine the mean form factor, the factor ratio or volumetric equation that allowed the determination of standing volume the entire forest stand. Among the methodologies volumetric equations are the best and most recommended. Keywords: Medium Form Factor, Factor Ratio, Volumetric Equations, Regression, Cubic Rigorous. INTRODUÇÃOOs inventários florestais consistem em utilizar técnicas de amostragem para obtenção de dados quantitativos e qualitativos de povoamentos florestais a fim de se determinar o volume de madeira presente e/ou futuro de uma floresta.O volume constitui uma das informações de maior importância para o conhecimento do potencial disponível em um povoamento florestal, haja vista que o volume individual fornece

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