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sediments

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 202214 March 2024

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 202231 October 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 202214 March 2024

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.

A pile of unprocessed coal briquettes is photographed from above. The image is in shades of gray and black and is more illuminated in the center than along the edges.
Posted inNews

Lake Sediments Record North Carolina’s Coal Legacy

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 14 October 20228 February 2023

Coal ash–polluted lakes are in residential and recreational areas, invoking concern for the health of local residents and ecosystems.

Illustration of the Giza pyramids, one under construction, along the Nile.
Posted inNews

Ancient Nile Tributary May Have Aided Pyramid Construction

by Jennifer Schmidt 6 October 20227 February 2023

Pollen from sediment cores shows that a now dry channel cutting through Giza was once a flowing waterway that Egyptian pyramid builders could have used to transport supplies.

A blue-gray river runs through a steep mountainous terrane, with the slopes nearest the river coated in green grasses, plants, and coniferous trees.
Posted inNews

What Can Zircons Tell Us About the Evolution of Plants?

by Alka Tripathy-Lang 5 October 202218 October 2022

The versatile mineral could contain evidence of the evolution of land plants and their effect on the sedimentary system.

Aerial view of a muddy river delta with meandering stream channels emanating from a river emerging from a forest
Posted inResearch Spotlights

When Projecting Coastal Resilience, Sediment Compaction Is Key

by Morgan Rehnberg 30 September 202230 September 2022

The addition of new sediment helps build up lowland environments like deltas and marshes, but it also compacts materials beneath it—a vital, but often overlooked, factor in landscape evolution studies.

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