Christopher R. Fielding
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View article: The impact of high discharge variability on sedimentology and architecture of bar deposits in the meandering Powder River (Montana, USA)
The impact of high discharge variability on sedimentology and architecture of bar deposits in the meandering Powder River (Montana, USA) Open
Point bars are emblematic deposits of meandering rivers. Classical facies models that define their architecture and sedimentology are essentially based on rivers with low to moderate peak discharge variability. However, many global rivers …
View article: A multidisciplinary approach to resolving the end-Guadalupian extinction
A multidisciplinary approach to resolving the end-Guadalupian extinction Open
The transition from the middle to late Permian (Guadalupian–Lopingian) is claimed to record one or more extinction events that rival the ‘Big Five’ in terms of depletion of biological diversity and reorganization of ecosystem structure. Ye…
View article: Mercury evidence from southern Pangea terrestrial sections for end-Permian global volcanic effects
Mercury evidence from southern Pangea terrestrial sections for end-Permian global volcanic effects Open
View article: Environmental change in the late Permian of Queensland, NE Australia: The warmup to the end-Permian Extinction
Environmental change in the late Permian of Queensland, NE Australia: The warmup to the end-Permian Extinction Open
View article: Lethal microbial blooms delayed freshwater ecosystem recovery following the end-Permian extinction
Lethal microbial blooms delayed freshwater ecosystem recovery following the end-Permian extinction Open
View article: Age and Paleoenvironmental Significance of the Frazer Beach Member—A New Lithostratigraphic Unit Overlying the End-Permian Extinction Horizon in the Sydney Basin, Australia
Age and Paleoenvironmental Significance of the Frazer Beach Member—A New Lithostratigraphic Unit Overlying the End-Permian Extinction Horizon in the Sydney Basin, Australia Open
The newly defined Frazer Beach Member of the Moon Island Beach Formation is identified widely across the Sydney Basin in both outcrop and exploration wells. This thin unit was deposited immediately after extinction of the Glossopteris flor…
View article: DWELLING IN THE DEAD ZONE—VERTEBRATE BURROWS IMMEDIATELY SUCCEEDING THE END-PERMIAN EXTINCTION EVENT IN AUSTRALIA
DWELLING IN THE DEAD ZONE—VERTEBRATE BURROWS IMMEDIATELY SUCCEEDING THE END-PERMIAN EXTINCTION EVENT IN AUSTRALIA Open
A distinctive burrow form, Reniformichnus australis n. isp., is described from strata immediately overlying and transecting the end-Permian extinction (EPE) horizon in the Sydney Basin, eastern Australia. Although a unique excavator cannot…
View article: Sedimentology of the continental end‐Permian extinction event in the Sydney Basin, eastern Australia
Sedimentology of the continental end‐Permian extinction event in the Sydney Basin, eastern Australia Open
Upper Permian to Lower Triassic coastal plain successions of the Sydney Basin in eastern Australia have been investigated in outcrop and continuous drillcores. The purpose of the investigation is to provide an assessment of palaeoenvironme…
View article: Controls on channel deposits of highly variable rivers: Comparing hydrology and event deposits in the Burdekin River, Australia
Controls on channel deposits of highly variable rivers: Comparing hydrology and event deposits in the Burdekin River, Australia Open
Discharge event frequency, magnitude and duration all control river channel morphology and sedimentary architecture. Uncertainty persists as to whether alluvial deposits in the rock record are a time‐averaged amalgam from all discharge eve…
View article: Refined Permian–Triassic floristic timeline reveals early collapse and delayed recovery of south polar terrestrial ecosystems
Refined Permian–Triassic floristic timeline reveals early collapse and delayed recovery of south polar terrestrial ecosystems Open
The collapse of late Permian (Lopingian) Gondwanan floras, characterized by the extinction of glossopterid gymnosperms, heralded the end of one of the most enduring and extensive biomes in Earth’s history. The Sydney Basin, Australia, host…
View article: End-Permian (252 Mya) deforestation, wildfires and flooding—An ancient biotic crisis with lessons for the present
End-Permian (252 Mya) deforestation, wildfires and flooding—An ancient biotic crisis with lessons for the present Open
Current large-scale deforestation poses a threat to ecosystems globally, and imposes substantial and prolonged changes on the hydrological and carbon cycles. The tropical forests of the Amazon and Indonesia are currently undergoing defores…
View article: Unit bar architecture in a highly‐variable fluvial discharge regime: Examples from the Burdekin River, Australia
Unit bar architecture in a highly‐variable fluvial discharge regime: Examples from the Burdekin River, Australia Open
Unit bars are relatively large bedforms that develop in rivers over a wide range of climatic regimes. Unit bars formed within the highly‐variable discharge Burdekin River in Queensland, Australia, were examined over three field campaigns b…
View article: Multiple post-depositional thermal events in the Drummond Basin, Australia: Evidence from apatite and zircon (U Th)/He thermochronology
Multiple post-depositional thermal events in the Drummond Basin, Australia: Evidence from apatite and zircon (U Th)/He thermochronology Open
View article: From intrabasinal volcanism to far-field tectonics: causes of abrupt shifts in sediment provenance in the Devonian–Carboniferous Drummond Basin, Queensland
From intrabasinal volcanism to far-field tectonics: causes of abrupt shifts in sediment provenance in the Devonian–Carboniferous Drummond Basin, Queensland Open
The Drummond Basin of central Queensland preserves a large-volume succession of little studied, predominantly fluviatile, coarse-grained sedimentary rocks of mid-Mississippian age. The stratigraphy of the basin has been subdivided into thr…
View article: Age and pattern of the southern high-latitude continental end-Permian extinction constrained by multiproxy analysis
Age and pattern of the southern high-latitude continental end-Permian extinction constrained by multiproxy analysis Open
View article: Early burial mud diapirism and its impact on stratigraphic architecture in the Carboniferous of the Shannon Basin, County Clare, Ireland
Early burial mud diapirism and its impact on stratigraphic architecture in the Carboniferous of the Shannon Basin, County Clare, Ireland Open
Delta fronts are often characterized by high rates of sediment supply that result in unstable slopes and a wide variety of soft‐sediment deformation, including the formation of overpressured and mobile muds that may flow plastically during…
View article: The role of discharge variability in the formation and preservation of alluvial sediment bodies
The role of discharge variability in the formation and preservation of alluvial sediment bodies Open
View article: Sedimentological evidence for rotation of the Early Permian Nambucca block (eastern Australia)
Sedimentological evidence for rotation of the Early Permian Nambucca block (eastern Australia) Open
The Early Permian tectonic history of eastern Australia led to the formation of several orogenic curvatures termed the New England oroclines. How these oroclines formed is a controversial issue that is crucial for understanding the paleo-P…
View article: Antarctic ice sheet sensitivity to atmospheric CO <sub>2</sub> variations in the early to mid-Miocene
Antarctic ice sheet sensitivity to atmospheric CO <sub>2</sub> variations in the early to mid-Miocene Open
Significance New information from the ANDRILL-2A drill core and a complementary ice sheet modeling study show that polar climate and Antarctic ice sheet (AIS) margins were highly dynamic during the early to mid-Miocene. Changes in extent o…
View article: Stratigraphic imprint of the Late Palaeozoic Ice Age in eastern Australia: a record of alternating glacial and nonglacial climate regime
Stratigraphic imprint of the Late Palaeozoic Ice Age in eastern Australia: a record of alternating glacial and nonglacial climate regime Open
Stratigraphic and sedimentological data from New South Wales and Queensland, eastern Australia, indicate that the Late Palaeozoic Ice Age comprised at least eight discrete glacial intervals (each 1–8 Ma in duration, here termed ‘glaciation…
View article: The tectonic significance of lower Permian successions in the Texas Orocline (Eastern Australia)
The tectonic significance of lower Permian successions in the Texas Orocline (Eastern Australia) Open
The Texas Orocline is a prominent orogenic curvature that developed during the early Permian in the southern New England Orogen. Outliers preserving lower Permian sedimentary successions (Bondonga, Silver Spur, Pikedale, Terrica, Alum Rock…