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sediments

Flat green land with small ponds
Posted inNews

The Bering Land Bridge Formed Much Later Than Previously Thought

by Clara Chaisson 28 February 202328 February 2023

New research reconstructs the Bering Strait’s flooding history, raising surprising questions about human migration and how ice sheets form.

Underwater photo of earth-toned stones of various shape, some with moss, and rays of sunshine.
Posted inNews

Decoding the Secrets of Shifting Sediments

by Clarissa Wright 23 February 202324 February 2023

In the small-scale details of grain shape, researchers have found a new way to understand how sediment flows in a river, a process shaping Earth’s landscapes.

Schematic representation of the model presented in this study.
Posted inEditors' Highlights

What Electrons Can Tell Us About the Speed of Sand

by Harrison Gray 13 February 202310 February 2023

A new sediment tracer uses the interactions between radiation, charge, and the Sun to uncover the hidden transport histories of sand grains.

Una pila de carbón sin procesar es fotografía desde arriba. La imagen está en tonos grises y negros y está más iluminada en el centro que en las orillas.
Posted inNews

Sedimentos lacustres registran el legado del carbón de Carolina del Norte

by Kimberly M. S. Cartier 8 February 20238 February 2023

Los lagos contaminados con cenizas de carbón se encuentran en áreas residenciales y recreativas, provocando preocupaciones por la salud de los residentes locales y los ecosistemas.

Photo of a forest floor with several downed trees. Exposed roots and dirt from a large tree are in the center.
Posted inNews

Roughed-Up Hillsides Reveal Tree-Toppling Winds

by Carolyn Wilke 7 February 20237 February 2023

Researchers are reading pockmarks in the forest floor to study the uprooting of trees in southern Indiana and estimate how fast winds howled through the forest in the past.

Diagram showing the formation and preservation of the iron sulfide greigite in bioturbidated anoxic sediments.
Posted inEditors' Highlights

New Mechanism for “Giant” Greigite Growth in Deep-Sea Sediments

by Agnes Kontny 2 December 202229 November 2022

Understanding greigite formation pathways in sediments is a prerequisite for assessing the marine iron-sulfur-carbon cycle and yield reliable near-syn-sedimentary paleomagnetic records.

A schematic of the mechanism that explains why shallow lakes are more sensitive to shallow water pollution with Arsenic than deep lakes.
Posted inEditors' Highlights

Understanding Enhanced Arsenic Pollution in Shallow Lakes

by Marc F. P. Bierkens 29 November 202225 January 2023

A new study explains why the arsenic that has accumulated in lake bottom sediments is more harmful to the lake ecosystems in shallow lakes.

A crew of about a dozen people handle a sediment core at their scientific drilling site at Chew Bahir in Ethiopia.
Posted inNews

Did a Chaotic Climate Drive Human Evolution?

by Elise Cutts 7 November 20221 February 2023

A new 620,000-year climate record from East Africa reveals dramatic swings between wet and dry conditions that may have influenced human evolution.

Satellite images of four different river basins.
Posted inEditors' Highlights

Disentangling River Water Turbidity and its Flow

by Simone Bizzi 3 November 20223 November 2022

A new study shows why fine sediments in rivers are not simply proportional to the water flow across the United States.

Photograph of a seagrass meadow
Posted inEditors' Highlights

Warming and Agitation Intensify Seagrass Meadow Carbon Fluxes

by Jorge Villa 17 October 202212 October 2022

Carbon dioxide emissions surge in sediments when temperature and agitation increase, both of which are likely to continue rising in degraded Mediterranean seagrass meadows.

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