Abstract The planform patterns of meandering submarine channels and subaerial fluvial bends show many similarities that have given rise to strong analogies concerning the fluid dynamics these channel types. Existing models helical motion in open‐channel depict flow is characterized by surface towards outer bank, basal inner bank. This paper investigates compares, through an analytical model physical experiment, flows within meanders, contain density‐driven gravity currents. results indicate...

Abstract Interactions between catchment variables and sediment transport processes in rivers are complex, behaviour during high‐flow events is not well documented. This paper presents an investigation into a short‐duration, high‐discharge event the Burdekin River, large sand‐ gravel‐bed river monsoon‐ cyclone‐influenced, semi‐arid tropics of north Queensland. The Burdekin's discharge highly variable strongly seasonal, with recorded maximum 40 400 m 3 s −1 . Sediment was sampled...

Research Article| July 01, 2012 Tidal signatures in an intracratonic playa lake R. Bruce Ainsworth; Ainsworth 1Australian School of Petroleum, University Adelaide, SA 5005, Australia Search for other works by this author on: GSW Google Scholar Stephen T. Hasiotis; Hasiotis 2Department Geology, The Kansas, 1475 Jayhawk Boulevard, Lindley Hall, Lawrence, Kansas 66045, USA Kathryn J. Amos; Amos Carmen B.E. Krapf; Krapf Tobias H.D. Payenberg; Payenberg Marianne L. Sandstrom; Sandstrom Boyan K....

Abstract Sediment gravity flows are the primary process by which sediment and organic carbon transported from continental margin to deep ocean. Up 40% of total marine pool is represented cohesive extracellular polymeric substances (EPS) produced microorganisms. The effect these polymers on has not been investigated, despite economic societal importance flows. We present first EPS concentrations measured in deep-sea sediment, combined with novel laboratory data that offer insights into...

Abstract Unit bars are relatively large bedforms that develop in rivers over a wide range of climatic regimes. formed within the highly‐variable discharge Burdekin River Queensland, Australia, were examined three field campaigns between 2015 and 2017. These had complex internal structures, dominated by co‐sets cross‐stratified planar‐stratified sets. The sets tended to down‐climb. development structures was primarily result processes: (i) superimposed reworking unit bar avalanche face; (ii)...

Continental rifts have a significant role in supercontinent breakup and the development of sedimentary basins. The Australian Adelaide Superbasin is one largest best-preserved rift systems that initiated during Rodinia, yet substantial challenges still hinder our understanding its early evolution place within Rodinian supercontinent. In past decade, passive margin development, mantle plumes their tectonics, geodynamics breakup, sequence stratigraphy tectonic settings has advanced...

Abstract Floodplains comprise geomorphologically important sources and sinks for sediments associated pollutants, yet the sedimentology of large dryland floodplains is not well understood. Processes occurring on such are often difficult to observe, techniques used investigate smaller perennial practical in these environments. This study assesses utility 137 Cs inventory depth‐profile determining relative amounts floodplain sedimentation Fitzroy River, northeastern Australia; a 143 000 km 2...

Research Article| June 23, 2017 Avulsion triggering by El Niño–Southern Oscillation and tectonic forcing: The case of the tropical Magdalena River, Colombia Sara Morón; Morón † 1Australian School Petroleum, University Adelaide, South Australia 5000, Australia2School Earth Sciences, Melbourne, Parkville, Victoria 3010, †smoron@unimelb.edu.au Search for other works this author on: GSW Google Scholar Kathryn Amos; Amos Douglas A. Edmonds; Edmonds 3Department Atmospheric Indiana University, 1001...

The type section of the late Ediacaran (ca 565 Ma) Bonney Sandstone in South Australia provides an opportunity to interpret a succession Precambrian clastic sediments using physical sedimentary structures, lithologies and stacking patterns. Facies models, sequence stratigraphic analysis, process-based architectural classification depositional elements were used environments for series disconformity-bounded intervals. This study is first detailed published work on Sandstone, additional...

Abstract The glaciogenic nature of the Yudnamutana Subgroup was first recognized over a century ago, and its global significance shortly after, with eventual postulation Sturtian Glaciation Snowball Earth theory. Much debate on origin timing these rocks, locally globally, has ensued in years since. A significant corpus research lithology, sedimentology, geochronology formal lithostratigraphy sequences globally attempted to resolve many debates. In type area for Glaciation, South Australia’s...

Abstract This paper presents a catchment‐scale investigation of anabranching in the moderately large 143 000 km 2 Fitzroy River catchment north‐eastern Australia. The primary aim is to determine whether mapped and remotely sensed data can provide useful information about characteristics this scale. Anabranching comprises 6% total channel network by length, 24% higher‐order channels (those with areas over 100 ). Three planform morphologies are described, which occur geographically distinct...

Abstract Discharge event frequency, magnitude and duration all control river channel morphology sedimentary architecture. Uncertainty persists as to whether alluvial deposits in the rock record are a time‐averaged amalgam from discharge events, or biased of larger events. This paper investigates controls on deposit character subsurface stratigraphic architecture with seasonal very high inter‐annual variability, Burdekin River north‐east Australia. In such rivers, most sediment movement is...

Abstract The late Ediacaran Billy Springs Formation is a little‐studied, mudstone‐dominated unit deposited in the Adelaide Rift Complex of South Australia. Sediments are exposed an approximately 11 km × 15 synclinal structure interpreted as salt‐withdrawal minibasin. stratigraphic succession characterized by convolute‐laminated slump deposits, rhythmically laminated silty mudstones, rare diamictites and fining‐upward turbidite lithofacies. Lithofacies product deposition deepwater slope or...

Research Article| January 11, 2019 Lateral Facies Variability Along the Margin of an Outcropping Salt-Withdrawal Minibasin, South Australia John W. Counts; Counts 1Irish Centre for in Applied Geosciences (iCRAG), O'Brien Science, University College Dublin, Belfield, Dublin 4, Ireland 3Australian School Petroleum, Level 2 Santos Petroleum Engineering Building, Adelaide, 5005, Search other works by this author on: GSW Google Scholar Charles R. Dalgarno; Dalgarno 220 Hedley Street, Mt. Gambier,...