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.
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.
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.
A novel method uses shifting bedrock to trace pulses of mass that propagate down a glacier.
Scientists accurately map the shape of the bedrock beneath a glacier using a new technique.
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.
The effect of particle size on bedrock erosion rates adds complexity to modeling bedrock channel evolution.