Earth’s magnetic field waxes and wanes as supercontinents form and break up, suggests a new study postulating a direct connection between our planet’s crust and its core.
Geochronology
Posted inResearch Spotlights
What Led to the Largest Volcanic Eruption in Human History?
A mineral-dating project at the Toba caldera in Indonesia sheds light on the science of supereruptions.
Posted inNews
Climate Warming May Have Helped Kill the Dinosaurs
New evidence indicates ancient warming spells that coincided with prodigious volcanism and a powerful meteorite impact, both seen as possible causes of mass extinctions about 66 million years ago.
Posted inOpinions
Geochronology: It's About Time
Chronology is at the heart of all geosciences, but its ubiquity has given it an image of a useful tool rather than a foundational discipline of its own.
Posted inResearch Spotlights
Dating Lava Domes in California's Salton Trough
Scientists use a trio of techniques to resolve the age and duration of rhyolite volcanism of the Salton Buttes.
Posted inScience Updates
Exploring Radioisotopic Geochronology and Astrochronology
IsoAstro Geochronology Workshop: The Integration and Intercalibration of Radioisotopic and Astrochronologic Time Scales;
Madison, Wisconsin, 18–23 August 2014
Posted inResearch Spotlights
Archean Rocks in the Acasta Gneiss Complex
Studying Archean-age gneissic and schistic rocks in northwestern Canada, researchers determined that the source of these rocks formed 4.3 billion years ago.
Posted inResearch Spotlights
Mountain Ranges Hold New Clues to Pangaea’s Formation
A new tectonic history of the Allegeny-Variscan range.
Posted inScience Updates
Advances in Remote Sensing of Magnetic Fields
Remote Atmospheric Magnetics Workshop;
Washington, D. C., 25–26 April 2014
Posted inNews
Decades-Old Sediment Cores Complicate Cascadia Earthquake History
Scientists have long known that the Pacific Northwest is vulnerable to massive earthquakes, but newly unearthed data raises questions about the strength and frequency of these quakes.