A critique of the plot routinely used to determine bulk magnetic properties concludes the technique is so ambiguous that new approaches to understanding magnetic mineral assemblages must be developed.
geology
Posted inScience Updates
Making Maps on a Micrometer Scale
Geographic information system software, created for mapping cities and continents, works equally well with the minuscule layers and inclusions that record a crystal’s history.
Posted inResearch Spotlights
New Insights into Continental Deformation in Northwestern Tibet
A new surface velocity map shows strain localized along major strike-slip features, suggesting the central Tibetan Plateau is not deforming as a fluid in response to gravitational collapse.
Posted inNews
Harry W. Green II (1940–2017)
By keenly probing mantle rheology, interactions of deformations and phase transitions, and microscopic features, he made major contributions to petrology, mineralogy, and earthquake science.
Posted inEditors' Vox
On Integrating Sedimentology and Hydrogeology in Streambeds
A new modeling blueprint seeks to unify sedimentology, hydrology, and hydrogeology in the modeling of streambeds.
Posted inEditors' Highlights
Acoustic Monitoring of Inelastic Compaction in Porous Limestone
During triaxial compression experiments, acoustic monitoring reveals compaction localization in a high porosity limestone, accompanied by a significant decrease in P-wave velocity.
Posted inNews
Diamond Impurities Reveal Water Deep Within the Mantle
A high-pressure form of ice, trapped within diamonds forged in the lower mantle, suggests that aqueous fluids reside deeper in Earth than we knew.
Posted inNews
Images Suggest a Viral Role in Some Rock Formation
Viruses might have helped transform dense bacterial colonies into a type of sedimentary rock that is frequently associated with underground oil reserves.
Posted inEditors' Highlights
What Happens Inside Rocks as They Fail?
An innovative technique provides micro-scale resolution on the three-dimensional evolution of damage within crystalline rocks that leads to fault nucleation.
Posted inResearch Spotlights
An Improved Understanding of How Rift Margins Evolve
A new seismic reflection study of the mid-Norwegian margin examines the role that low-angle, high-displacement faults play in the evolution of continental rifts.