Samuel J. Bentley
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View article: A Comparison of Characteristics of Infilling Sediments in Three Mud-Capped Dredge Pits on the Louisiana Continental Shelf
A Comparison of Characteristics of Infilling Sediments in Three Mud-Capped Dredge Pits on the Louisiana Continental Shelf Open
Due to high sedimentation rate up to ~1 m/year, mud-capped dredge pits (MCDP) are often considered natural laboratories for studying sedimentary processes, slope stability and the impacts of dredging activities on marine environments. Alth…
View article: A Comparison of Characteristics of Infilling Sediments in Mud-Capped Dredge Pits on the Louisiana Continental Shelf
A Comparison of Characteristics of Infilling Sediments in Mud-Capped Dredge Pits on the Louisiana Continental Shelf Open
Due to high sedimentation rate of ~1 m/year, mud-capped dredge pits (MCDP) are often considered as natural labs to study detailed sedimentary processes, slope stability, and the impacts of dredging activities on marine environments. Althou…
View article: Rapid decline and mortality of a Pleistocene-aged forest now submerged in the northern Gulf of Mexico, USA
Rapid decline and mortality of a Pleistocene-aged forest now submerged in the northern Gulf of Mexico, USA Open
The Gulf and Atlantic Coastal Plains of the southern United States are characterized by a wide continental shelf that was subaerially exposed for ca. 80,000 years during glacial-interval marine regressions and transgressions. Given their p…
View article: Short-Term Sediment Dispersal on a Large Retreating Coastal River Delta via 234Th and 7Be Sediment Geochronology: The Mississippi River Delta Front
Short-Term Sediment Dispersal on a Large Retreating Coastal River Delta via 234Th and 7Be Sediment Geochronology: The Mississippi River Delta Front Open
Many Mississippi River Delta studies have shown recent declines in fluvial sediment load from the river and associated land loss. In contrast, recent sedimentary processes on the subaqueous delta are less documented. To help address this k…
View article: Sedimentary Processes and Instability on the Mississippi River Delta Front near the Shipwreck of the SS Virginia
Sedimentary Processes and Instability on the Mississippi River Delta Front near the Shipwreck of the SS Virginia Open
Sediment cores were collected from a mudflow lobe (80 m water depth) offshore of the Mississippi River’s Southwest Pass in 2017 to better understand the sedimentology near the lobe entraining the SS Virginia shipwreck (sunk by a German U-b…
View article: Sedimentary Processes and Instability on the Mississippi River Delta Front near the Shipwreck of the SS Virginia
Sedimentary Processes and Instability on the Mississippi River Delta Front near the Shipwreck of the SS Virginia Open
Sediment cores were collected from a mudflow lobe (80 m water depth) offshore of the Mississippi River’s Southwest Pass in 2017 to better understand the sedimentology near the lobe entraining the SS Virginia shipwreck (sunk by a German U-B…
View article: A conceptual Investigation of Turbidity Current Trigger from Alongshelf Current-supported Turbidity Currents
A conceptual Investigation of Turbidity Current Trigger from Alongshelf Current-supported Turbidity Currents Open
Wave- and current-supported turbidity currents (WCSTCs) are one of the sediment delivery mechanisms from the inner shelf to the shelf break. Therefore, they play a significant role in the global cycles of geo-chemically important particula…
View article: The LSU campus mounds, with construction beginning at ∼11,000 BP, are the oldest known extant man-made structures in the Americas
The LSU campus mounds, with construction beginning at ∼11,000 BP, are the oldest known extant man-made structures in the Americas Open
Radiocarbon dating of the two LSU Campus Mounds (16EBR6) indicates that the construction of one, Mound B, began at ~11,000 BP, making Mound B the oldest known and intact manmade structure in the Americas. The age analyses preesented here a…
View article: Timescale dependent sedimentary record during the past 130 kyr from a tropical mixed siliciclastic–carbonate shelf edge and slope: Ashmore Trough (southern Gulf of Papua)
Timescale dependent sedimentary record during the past 130 kyr from a tropical mixed siliciclastic–carbonate shelf edge and slope: Ashmore Trough (southern Gulf of Papua) Open
In tropical and sub‐tropical mixed siliciclastic–carbonate depositional systems, fluvial input and in situ neritic carbonate interact over space and time. Despite being the subject of many studies, controls on partitioning of mixed sedimen…
View article: The role of sediment-induced light attenuation on primary production during Hurricane Gustav (2008)
The role of sediment-induced light attenuation on primary production during Hurricane Gustav (2008) Open
We introduced a sediment-induced light attenuation algorithm into a biogeochemical model of the Coupled Ocean–Atmosphere–Wave–Sediment Transport (COAWST) modeling system. A fully coupled ocean–atmospheric–sediment–biogeochemical simulation…
View article: A Numerical Investigation of Wave‐Supported Gravity Flow During Cold Fronts Over the Atchafalaya Shelf
A Numerical Investigation of Wave‐Supported Gravity Flow During Cold Fronts Over the Atchafalaya Shelf Open
Wave‐supported fluid mud (WSFM) plays an important role in sediment downslope transport on the continental shelves. In this study, we incorporated WSFM processes in the wave boundary layer (WBL) into the Community Sediment Transport Modeli…
View article: The Role of Sediment-induced Light Attenuation on Primary Production during Hurricane Gustav (2008)
The Role of Sediment-induced Light Attenuation on Primary Production during Hurricane Gustav (2008) Open
We introduce a sediment-induced light attenuation algorithm into the biogeochemical model of the Regional Ocean Modeling System (ROMS). A fully coupled ocean-atmospheric-sediment-biogeochemical simulation is carried out to assess the impac…
View article: Numerical Experiments on Variation of Freshwater Plume and Leakage Effect From Mississippi River Diversion in the Lake Pontchartrain Estuary
Numerical Experiments on Variation of Freshwater Plume and Leakage Effect From Mississippi River Diversion in the Lake Pontchartrain Estuary Open
A Finite Volume Community Ocean Model is used to investigate how wind impacts the circulation and evolution of a freshwater plume from Mississippi River diversion in the Lake Pontchartrain Estuary. Results show that northerly and southerly…
View article: Mud deposition and diagenesis within an Early Palaeozoic clinothem: Power Steps Formation, Newfoundland, Canada
Mud deposition and diagenesis within an Early Palaeozoic clinothem: Power Steps Formation, Newfoundland, Canada Open
The early Ordovician (∼385 Ma) Power Steps Formation, Newfoundland, Canada, exposes a well-preserved mudstone-dominated clinothem that serves as an excellent archive for understanding how mud has been produced, transported and converted in…
View article: A Two Decadal (1993–2012) Numerical Assessment of Sediment Dynamics in the Northern Gulf of Mexico
A Two Decadal (1993–2012) Numerical Assessment of Sediment Dynamics in the Northern Gulf of Mexico Open
We adapted the coupled ocean-sediment transport model to the northern Gulf of Mexico to examine sediment dynamics on seasonal-to-decadal time scales as well as its response to decreased fluvial inputs from the Mississippi-Atchafalaya River…
View article: Estimating Surface/Subsurface Sediment Mixing in Karst Settings Using <sup>7</sup>Be Isotopes
Estimating Surface/Subsurface Sediment Mixing in Karst Settings Using <sup>7</sup>Be Isotopes Open
This study shows that the cosmogenic radionuclide beryllium‐7 can be used to track sediment movement through caves. The activities of beryllium‐7 and cesium‐137 were measured in two different karst settings at both surface and subsurface s…
View article: Implications of Texture and Erodibility for Sediment Retention in Receiving Basins of Coastal Louisiana Diversions
Implications of Texture and Erodibility for Sediment Retention in Receiving Basins of Coastal Louisiana Diversions Open
Although the Mississippi River deltaic plain has been the subject of abundant research over recent decades, there is a paucity of data concerning field measurement of sediment erodibility in Louisiana estuaries. Two contrasting receiving b…