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sediments

A satellite image of a braided river shows many channels branching out and reconnecting.
Posted inResearch Spotlights

Coherent, Not Chaotic, Migration in the Brahmaputra-Jamuna River

by Rebecca Owen 2 July 202512 August 2025

The channel threads in braided river systems may be more predictable than previously thought.

Close-up view of pieces of sea ice separated by a strip of open water.
Posted inScience Updates

Finding Consensus on Arctic Ocean Climate History

by Jochen Knies, Matt O’Regan and Claude Hillaire Marcel 25 June 202525 June 2025

Understanding the effects of a “blue” Arctic Ocean on future climate requires a coordinated effort to study Earth’s past warm periods using a variety of classical and cutting-edge methods.

A bird’s-eye view of the Mississippi River delta. The main river runs left to right across the photo and wispy clouds are visible in the foreground.
Posted inNews

Tracking the Sediment Carried by the Muddy Mississippi

by Delaney Dryfoos 10 June 20259 June 2025

New research shows that typically, less than 10% of land-building alluvium reaches the Bird’s Foot Delta region, the southernmost reach of the river, where it meets the Gulf.

In the foreground is a beach covered in brownish seaweed, farther back is a body of water coated in chunks of floating ice, and in the distance are mountains and the sky.
Posted inResearch Spotlights

Seaweed Surges May Alter Arctic Fjord Carbon Dynamics

Sarah Stanley, Science Writer by Sarah Stanley 16 May 202516 May 2025

Climate change–accelerated seaweed growth could cause seaweed-dependent microbes to proliferate and consume more oxygen, leading to a rise in oxygen-starved zones.

Fine-grained sand on the ocean floor, marked by the rippling movement of currents
Posted inResearch Spotlights

Mapping the Ocean Floor with Ancient Tides

Aaron Sidder, freelance science writer by Aaron Sidder 6 May 20256 May 2025

A new study uses a paleotidal model to trace the formation of carbon-rich mud deposits over thousands of years.

Small plastic fragments on sand and stones.
Posted inNews

Avalanches of Microplastics Carry Pollution into the Deep Sea

by Grace van Deelen 23 April 202523 April 2025

Scientists observed a once-theorized process ferrying microplastics into the deep ocean.

A reddish planet appears with a blue ocean covering most of its upper half
Posted inNews

Buried Sediments Point to an Ancient Ocean on Mars

Katherine Kornei, Science Writer by Katherine Kornei 26 March 202526 March 2025

Ground-penetrating radar data collected by the Zhurong rover reveal gently sloping sediments in Mars’s northern lowlands that hint at a shoreline.

Un lago rodeado por montañas rocosas
Posted inNews

El ADN de los sedimentos lacustres revelan el impacto de los peces introducidos

by Jasmin Galvan 5 March 20255 March 2025

La trucha no nativa ha alterado la diversidad del zooplancton que habita en los lagos de gran elevación.

Four scientists celebrate with karaoke on the deck of the JOIDES Resolution.
Posted inOpinions

Expedition 403: Sailing the Last Expedition of the JOIDES Resolution

by Adriane Lam, Gryphen Goss and Nicole Greco 28 February 202528 February 2025

Early-career geoscientists share melancholy memories about hard science and intangible networks of collaboration.

Diagram from the study.
Posted inEditors' Highlights

How Rock Type Shapes River Networks and Influences Landscape Evolution

by Marisa Repasch 10 February 20256 February 2025

A new study in Chile shows how small differences in rock type can drive large differences in erosion, vegetation, and river networks, illuminating the role of mineralogy in shaping landscapes.

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