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sediments

An image depicts a thin layer of sedimentary rock under a microscope. Fragments of fossilized organisms show up as small dark blobs.
Posted inNews

Biomass and Biodiversity Were Coupled in Earth’s Past

by Grace van Deelen 9 July 20259 July 2025

Measuring shells and skeletons encased in thousands of limestone samples has revealed that the sheer amount of living stuff in Earth’s oceans changed alongside the diversity of organisms.

A man in a bright yellow shirt crouches on a hill, overlooking a burned landscape.
Posted inNews

Pollution from Wildfires Can Contaminate Our Water for up to 8 Years, Study Finds

by Sophie Hurwitz 8 July 20258 July 2025

An analysis of 500 watersheds found levels of organic carbon, phosphorus, and other pollutants up to 103 times higher after a wildfire.

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 20252 July 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.

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