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clays

Three Major League Baseball baseballs arranged in a row angling away from the camera. The baseball in the foreground is in focus; the others blur into the background.
Posted inNews

Geoscientists Demystify Baseball’s Magic Mud

by Elise Cutts 5 December 20245 December 2024

Taking baseball’s mysterious Rubbing Mud into the lab revealed no magic ingredients—but plenty of useful natural properties from geomaterials.

Foto olhando para o fundo do mar, mostrando pedaços arredondados de lava negra sobre argila vermelha.
Posted inNews

Uma Ilha Tropical Há Muito Perdida Fica no Litoral do Brasil

by Erin Martin-Jones 25 October 202425 October 2024

Um platô vulcânico submerso no sudoeste do Atlântico foi uma ilha tropical há 45 milhões de anos.

A microscopic image of remnants of silicifying organisms
Posted inNews

Clays May Have Slowed Earth’s Recovery After the Great Dying

by Kate Evans 19 August 202419 August 2024

Without tiny marine organisms using silica for shells, Earth’s oceans generated more clay, released more carbon dioxide, and kept Earth warmer for longer.

View from a remotely operated vehicle looking down at the seabed, showing rounded lumps of black lava sitting on top of red clay.
Posted inNews

A Long-Lost Tropical Island Lies Off Brazil’s Coast

by Erin Martin-Jones 12 March 202425 October 2024

An undersea volcanic plateau in the southwestern Atlantic was a tropical island 45 million years ago.

Comparison of the range of lithium isotopic ratios measured in this work at the Bisley 1 catchment in Puerto Rico with those previously published.
Posted inEditors' Highlights

Extreme Lithium Isotope Fractionations During Intense Weathering

by Lixin Jin 18 April 202221 December 2022

Extreme lithium fractionation is observed when primary minerals in andesite are transformed to secondary clay minerals and then to oxides with intensive chemical weathering in a tropical climate.

Detailed image shows sculpted layers of ice at Mars’s south pole.
Posted inNews

The Bumpy Search for Liquid Water at the South Pole of Mars

Damond Benningfield, Science Writer by Damond Benningfield 8 March 20228 March 2022

Studies since 2018 have provided competing explanations of bright radar reflections from the base of the south polar ice cap.

Two microstructural schematic diagrams showing how clay influences the void space connectivity and permeability of unfaulted sandstone and faulted sandstone.
Posted inEditors' Highlights

Clay Type, Not Just Content, Crucial for Fault Zone Permeability

by Michael Heap 14 February 202219 October 2022

Faults containing clays are often considered as barriers to fluid flow but new work shows that fault processes leading to the formation of clays can increase permeability relative to the host rock.

Two charts comparing saturated hydraulic conductivity as function of clay content for temperate and tropical environments.
Posted inEditors' Highlights

Not All Clays are Made Equal – and it Matters for Hydrology

by Valeriy Ivanov 10 February 20228 August 2022

Soil clay content is an important characteristic that affects many hydraulic and mechanical properties of soil; clay mineral type is important for their prediction.

Sediment sampling sites along the Chilean coast showing the locations of marine surface sediment sampling and river sediment sampling.
Posted inEditors' Highlights

Tracking Reverse Weathering

by S. D. Jacobsen 12 March 202024 February 2022

Using beryllium isotopes to track in situ formation of clays in the ocean, known as reverse weathering, will improve global models of atmospheric carbon dioxide and ocean alkalinity.

Multicomponent ionic transport simulations in a physically and electrostatically heterogeneous domain
Posted inEditors' Highlights

Modeling Transport and Charge Effects in Heterogeneous Media

by Xavier Sanchez-Vila 19 February 20206 February 2023

Simulation of charged species reactive transport in complex physically and electrostatically heterogeneous porous media is possible with a multiple continua approach coupled to a geochemical code.

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