Abstract Coastal Louisiana has lost about 5,000 km 2 of wetlands over the past century and concern exists whether remaining will persist while facing some world’s highest rates relative sea-level rise (RSLR). Here we analyse an unprecedented data set derived from 274 rod surface-elevation table-marker horizon stations, to determine present-day change, vertical accretion shallow subsidence rates. Comparison with RSLR at land surface (present-day are 12±8 mm per year) shows that 65% in...

Abstract Fluvial channels encounter a backwater reach when they approach standing body of water, and recent studies have shown that the transition from normal flow to backwater-influenced is associated with sediment mass extraction through deposition. Here we test hypothesis systematic changes in geometry channel-belt deposits sedimentary architecture occur across this transition, using data late Holocene Mississippi (southern USA) Rhine (The Netherlands) fluvio-deltaic systems. We use...

Fieldwork is considered critical to developing technical skills in geoscience education, and typical undergraduate degrees require >30 days the field. Tuition costs of enrolling field camp are acknowledged as a barrier participation geosciences; however, cost activities may also include personal gear (hiking boots, backpacks, etc.), travel, lost wages, dependent care. To neutralize impacts systemic bias on future workforce, it imperative that we (a) examine how work presents barriers...

Research Article| July 31, 2018 The Stratigraphically Preserved Signature of Persistent Backwater Dynamics in a Large Paleodelta System: Mungaroo Formation, North West Shelf, Australia John Martin; Martin 1Shell International Exploration and Production, Projects Technology, Houston, Texas 77082, U.S.A. Search for other works by this author on: GSW Google Scholar Anjali M. Fernandes; Fernandes 2Center Integrative Geosciences, University Connecticut at Storrs, 06269, Jennifer Pickering;...

Foram analisadas as manifestações clínicas, métodos diagnósticos e opções terapêuticas do metapneumovírus humano (HMPV) em pacientes pediátricos, destacando seus impactos nos desfechos clínicos na qualidade de vida. Foi realizada uma revisão integrativa base dados PubMed - MEDLINE, utilizando os descritores Metapneumovirus, Human, Human metapneumovirus, Child, Children, Child s, Children Childrens Childs, combinados com operadores booleanos “AND” “OR”. Inicialmente, foram identificados 425...

We address the question of quantifying uncertainty associated with autogenic pattern variability in a channelized transport system by means modern geostatistical method. This has considerable relevance for practical subsurface applications as well, particularly those related to quantification relying on Bayesian approaches. Specifically, we show how laboratory experiment can be represented and reproduced multiple-point prior model. The latter method requires selection limited set training...

Coastal Louisiana has lost about 5,000km2 of wetlands over the past century and concern exists whether remaining will persist while facing some world’s highest rates relative sea-level rise (RSLR). Here we analyse an unprecedented data set derived from 274 rod surface-elevation table-marker horizon stations, to determine present-day change, vertical accretion shallow subsidence rates. Comparison with RSLR at land surface (present-day are 12±8mm per year) shows that 65% in Mississippi Delta...

River floodplains can be both sources and sinks for organic carbon. In the sedimentary record, geochemical signatures of terrestrial water availability record climate ecology along river corridors in deep time. However, paleoenvironmental reconstructions are often confounded by complex dynamics carbon residence, entrainment, deposition a fluvial system. As alluvial rivers migrate across their basins, they erode older deposits, integrating environmental with that other sediment transport....

Fieldwork is considered critical to developing technical skills in geoscience education, and typical undergraduate degrees require >30 days the field. Tuition costs of enrolling field camp are acknowledged as a barrier participation geosciences; however, cost activities may also include personal gear (hiking boots, backpacks, etc.), travel, lost wages, dependent care. To neutralize impacts systemic bias on future workforce, it imperative that we (a) examine how work presents barriers...

Studies of the fossil record can inform our understanding not only causes mass extinctions, but also their effects on biodiversity, ecology and evolution. Here, we examine regional-scale ecological changes resulting from a Late Devonian extinction event using brachiopod assemblages Appalachian Basin. About half species went extinct, were largely replaced by new immigrant taxa. Both before after extinction, primary gradient in faunal composition was correlated with onshore-offshore position,...

ABSTRACT Connecting real-time measurements of current–bed interactions to the temporal evolution submarine channels can be extremely challenging in natural settings. We present a suite physical experiments that offer insight into spectrum between turbidity currents and their channels, from i) detachment-limited erosion ii) transport-limited iii) pure deposition. In all three cases channel sinuosity influenced patterns deposition; outsides bends displayed highest rates first two but showed...

Connecting real time measurements of current-bed interactions to the temporal evolution submarine channels can be extremely challenging in natural settings. We present a suite physical experiments that offer insight into spectrum between turbidity currents and their channels, from (i) detachment-limited erosion (ii) transport-limited (iii) pure deposition. In all three cases channel sinuosity influenced patterns deposition; outsides bends displayed highest rates first two cases, whereas were...

When interpreting environmental signals in the deep marine sedimentary archive, separating record of local flow and sediment dynamics from that terrestrial transport system feeds it can be challenging. We used a physical experiment to study sedimentation on prograding, hyperpycnal flow-dominated delta, shelf submarine slope subject slow rates base-level rise (pseudo-subsidence). Our experiments are most relevant margins where sediment-rich deltaic systems prograde towards shelf-edge under...

Fluvial deltas have worldwide socio-economic importance as human development and infrastructure centers provide several ecosystem services, including storm protection nursery habitats. Their subsurface architecture also holds clues to past climate sea-level change that can be reconstructed from stratigraphy. A significant challenge in inverting stratigraphy is separating the signals of external forcing, such variations sea level, internal processes, dynamics fluvial surface channel network...

Rivers drive geomorphic change at Earth’s surface by transporting sediment from mountains to sedimentary basins. They are sensitive changes in water and flux driven tectonism, climatic perturbation or volcanism. We characterized fluvial landscapes during a major Cenozoic cooling event, the Eocene-Oligocene Transition (EOT) 33.9 Ma. The EOT is long term ~4-5°C decrease global mean annual temperature, punctuated short, intense fluctuations. In Great Plains region of central North America,...

Member of the Brule Formation White River Group at Toadstool Geologic Park in Nebraska. Our approach combined descriptive and quantitative methods to reconstruct river flow, sediment transport, channel dynamics, floodplain behavior, catchment-scale moisture variability ecosystem function. We found that rivers were ephemeral, with peak flow depths widths approximately 2.5 m 65 respectively. Median discharges 168 cms, base flows near zero, as indicated by subaerial exposure surfaces on beds....

Abstract Studying the centennial or millennial timescale response of large rivers to changing patterns in precipitation, discharge, flood intensity and recurrence, associated sediment erosion is critical for understanding long‐term fluvial geomorphic adjustment climate. Long hydrographs, maintaining reliable Flow Duration Curves (FDCs), are a fundamental input such simulations; however, recorded discharge series rarely span more than few decades. The absence robust methodologies generating...

Innovative science benefits from diversity of thought and influence at all waypoints along the scientific journey, early education to career-length contributions in research mentorship. Scientific societies, like Society for Sedimentary Geology (SEPM), steward their innovators direction science, thereby defining societal impact evolution a discipline. They are uniquely positioned promote representation success scientists, including those minoritized populations, through proactive advocacy,...

Innovative science benefits from diversity of thought and influence at all waypoints along the scientific journey, early education to career-length contributions in research mentorship. Scientific societies, like Society for Sedimentary Geology (SEPM), steward their innovators direction science, thereby defining societal impact evolution a discipline. They are uniquely positioned promote representation success scientists, including those minoritized populations, through proactive advocacy,...