More Like this

1. Strain hardening by sediment transport

   https://doi.org/10.1103/PhysRevResearch.4.L022055  

   Cúñez, Fernando D.; Franklin, Erick M.; Houssais, Morgane; Arratia, Paulo; Jerolmack, Douglas J. (June 2022, Physical Review Research)
2. Harmar Pond Sediment Core Metals

   https://doi.org/10.26022/IEDA/112281  

   Hill, Memphis Hill; Bain, Daniel Bain; Rossi, Robert Rossi; Abbott, Mark Abbott (January 2022, Interdisciplinary Earth Data Alliance (IEDA))

   A sediment core was collected from a small urban pond in Harmar Township, Pennsylvania. Half centimeter intervals of the sediment core were digested using 6mL of 10% (vol/vol) sub-boil distilled trace metal grade nitric acid. Sediment metals were measured to better understand the history of metal contamination in the Pittsburgh region. 

   more » « less
3. Arctic Continental-Shelf Sediment Dynamics

   https://doi.org/10.1146/annurev-marine-040423-023827  

   Eidam, Emily F; Stark, Nina; Nienhuis, Jaap H; Keogh, Molly; Obelcz, Jeff (July 2024, Annual Review of Marine Science)

   Sediments covering Arctic continental shelves are uniquely impacted by ice processes. Delivery of sediments is generally limited to the summer, when rivers are ice free, permafrost bluffs are thawing, and sea ice is undergoing its seasonal retreat. Once delivered to the coastal zone, sediments follow complex pathways to their final depocenters—for example, fluvial sediments may experience enhanced seaward advection in the spring due to routing under nearshore sea ice; during the open-water season, boundary-layer transport may be altered by strong stratification in the ocean due to ice melt; during the fall storm season, sediments may be entrained into sea ice through the production of anchor ice and frazil; and in the winter, large ice keels more than 20 m tall plow the seafloor (sometimes to seabed depths of 1–2 m), creating a type of physical mixing that dwarfs the decimeter-scale mixing from bioturbation observed in lower-latitude shelf systems. This review summarizes the work done on subtidal sediment dynamics over the last 50 years in Arctic shelf systems backed by soft-sediment coastlines and suggests directions for future sediment studies in a changing Arctic. Reduced sea ice, increased wave energy, and increased sediment supply from bluffs (and possibly rivers) will likely alter marine sediment dynamics in the Arctic now and into the future. 

   more » « less
4. Toward generalizable sediment fingerprinting with tracers that are conservative and nonconservative over sediment routing timescales

   https://doi.org/10.1007/s11368-014-0913-5  

   Belmont, Patrick; Willenbring, Jane K.; Schottler, Shawn P.; Marquard, Julia; Kumarasamy, Karthik; Hemmis, Jay M. (August 2014, Journal of Soils and Sediments)
5. Surficial sediment remobilization by shear between sediment and water above tsunamigenic megathrust ruptures: experimental study

   https://doi.org/10.5194/esurf-13-341-2025  

   Seibert, Chloé; McHugh, Cecilia; Paola, Chris; Seeber, Leonardo; Tucker, James (January 2025, Earth Surface Dynamics)

   Abstract. Large subduction earthquakes can rupture the shallow part of the megathrust with unusually large displacements and tsunamis. The long duration of the seismic source and high upper-plate compliance contribute to large and protracted long-period motions of the outer upper plate. The resulting shear stress at the sediment–water interface in, for example, the Mw 9.0 2011 Tohoku–Oki earthquake could account for surficial sediment remobilization on the outer margin. We test this hypothesis by simulating in physical tank experiments the combined effects of high- and low-frequency seismic motions on sediment of different properties (chemistry, grain size, water content, and salinity). Our results show that low-frequency motion during a 2011-like earthquake can entrain several centimeters of surficial sediment and that entrainment can be enhanced by high-frequency vertical oscillations. These experiments validate a new mechanism of co-seismic sediment entrainment in deep-water environments. 

   more » « less