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sediments

A Velociraptor with white, black, and red feathers runs with its mouth open.
Posted inNews

Volcanic Winters Ushered in the Jurassic Reign of the Dinosaurs

Katherine Kornei, Science Writer by Katherine Kornei 31 August 202222 March 2023

Sediment cores from northwestern China reveal freezing conditions during the Late Triassic killed off many forms of life—but not dinosaurs.

A boy in a striped t-shirt and shorts steers a long, narrow, and shallow boat with a long pole across a shallow body of water. The boat is laden with rocks. In the background is a marshland with a small group of people and a few tents, and beyond that are forests and mountains. One patch of forest on the right side of the mountains has been stripped bare by a past landslide.
Posted inResearch Spotlights

Bangladeshis Feel Increased Consequences of Sedimentation

by Saima May Sidik 30 August 202230 August 2022

In northern Bangladesh, residents are losing their livelihoods, homes, and personal safety when water carries sand and gravel into their communities.

Sensors attached to an orange buoy on the deck of a research vessel
Posted inNews

River Floods Can Trigger Powerful Underwater Landslides

by Carolyn Wilke 26 August 202224 March 2023

A record-length turbidity current triggered by river flooding has revealed a new link between the surface and the deep sea.

Three field photos of the study area.
Posted inEditors' Highlights

Searching for Earth’s Oldest Rocks in its Youngest Deposits

by Peter van der Beek 18 August 202225 August 2022

By sampling and analyzing zircons from glacial eskers dating from about 20,000 years ago, the extent of the oldest known rocks on Earth can be better mapped and constrained.

Two satellite photos of the Lut Desert with arrows depicting wind-driven transport routes of sediment.
Posted inEditors' Highlights

A Unique Glimpse at Sediment Erosion and Deposition by Wind

by Valeriy Ivanov 21 July 202221 July 2022

The Lut Desert in Iran is an exceptional natural laboratory to study how wind moves sediment across the landscape. A new study quantifies erosional and depositional sediment fluxes of the desert.

San Pablo Bay marsh
Posted inResearch Spotlights

Atmospheric Rivers Help Coastal Wetlands Build Up Sediment

by Alexandra K. Scammell 13 July 202211 August 2022

Accounting for these storms and flooding can help experts predict and respond to rising sea levels.

Satellite images of the Yangtze River in 1999 and 2010, showing a radical reduction in suspended sediment
Posted inNews

Satellites Show Magnitude of Human Influence on River Sediment Flux

by Mohammed El-Said 12 July 20228 September 2022

Dam-building has decreased the amount of sediment transported by rivers, while land use changes have increased the amount.

A gold-colored spacecraft with large solar panels flies in front of Mars.
Posted inNews

Zhurong Rover Spots Evidence of Recent Liquid Water on Mars

Katherine Kornei, Science Writer by Katherine Kornei 14 June 20225 January 2023

The Chinese rover identified hydrated minerals—likely associated with groundwater—in sediments dating to the Red Planet’s most recent geologic period.

Images showing the ArchKalmag14k model output for Paris (France) compared to other geomagnetic field models..
Posted inEditors' Highlights

Time-Step Filtering in Holocene Global Magnetic Field Models

by Mark J. Dekkers 9 June 20229 May 2023

Through a local fixed time-step filter, global Holocene magnetic field models remain mathematically tractable refining our insight into field variability and improving archeological dating.

Charts comparing observed sea-surface temperature with high-resolution reconstructions.
Posted inEditors' Highlights

Unlocking Ultra-High-Resolution Paleothermometry from Sediments

by Kaustubh Thirumalai 18 May 202214 September 2022

Mass spectrometric imaging techniques used to extract micron-scale organic paleothermometry signatures from Arabian Sea sediments show that they skillfully reflect observations.

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