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bedrock

Small waves crashing on the coast with a city skyline in the background.
Posted inNews

Supersized Potholes Discovered off South African Coast

by J. Besl 8 June 20238 June 2023

Curious circular pits off South Africa’s Eastern Cape coast are larger than any similar feature previously recorded. Their origin remains a morphological mystery.

Diagram from the paper.
Posted inEditors' Highlights

Inductive Approach Reveals Controls on Dissolved Organic Carbon

by Adam S. Ward 5 May 20235 May 2023

Machine learning leverages large data sets to reveal hidden patterns explaining when, where, and why dissolved organic carbon moves from hillslopes to streams.

Three field photos of the study area.
Posted inEditors' Highlights

Searching for Earth’s Oldest Rocks in its Youngest Deposits

by Peter van der Beek 18 August 202225 August 2022

By sampling and analyzing zircons from glacial eskers dating from about 20,000 years ago, the extent of the oldest known rocks on Earth can be better mapped and constrained.

Three figures from the paper showing a map of bedrock channels on the seafloor, an image of a remotely-operated vehicle, and an image of potholes.
Posted inEditors' Highlights

New Observations Reveal Ancient Subglacial Water Paths

by Olga Sergienko 13 April 20222 August 2022

Analyses of new shipboard and ROV observations of bedrock channels carved by floods and outbursts from subglacial lakes under Antarctica shed light on complex subglacial processes.

Gyldenlove Glacier discharges into a fjord in southern Greenland.
Posted inNews

“Sticky” Ice Sheets May Have Led to More Intense Glacial Cycles

by Clara Chaisson 5 January 20223 July 2023

New research attributes a shift to longer, stronger glacial cycles to increased friction between ice sheets and bedrock in the Northern Hemisphere 1 million years ago.

Researchers assess how ice movement affects bedrock beneath Greenland’s Rink Glacier.
Posted inResearch Spotlights

Massive Waves of Melting Greenland Ice Warped Earth’s Crust

by E. Underwood 28 June 201711 January 2022

A novel method uses shifting bedrock to trace pulses of mass that propagate down a glacier.

Aletsch glacier seen from Jungfraujoch.
Posted inResearch Spotlights

Cosmic Muons Reveal the Land Hidden Under Ice

by Jenny Lunn 23 May 201730 September 2022

Scientists accurately map the shape of the bedrock beneath a glacier using a new technique.

Researchers assess whether methods of studying alluvial rivers are helpful to understanding behavior of rivers without loose sediment.
Posted inResearch Spotlights

How Do Rivers Flow over Bedrock?

by Terri Cook 8 May 201713 October 2022

A study questions whether the hydraulics of rivers that lack loose sediments along their bottoms can be accurately depicted by standard equations for flow over sediment.

Posted inResearch Spotlights

Largest Grains Dominate River Bedrock Erosion Rates

by Terri Cook 3 September 201524 February 2022

The effect of particle size on bedrock erosion rates adds complexity to modeling bedrock channel evolution.

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