A new study finds that Earth’s magnetic field intensity varied significantly during the Cretaceous Normal Superchron, providing insights into the operation of the geodynamo during superchrons.
Journal of Geophysical Research: Solid Earth
Posted inEditors' Highlights
Repeated Coseismic Uplift Above the Patton Bay Splay Fault, Alaska
Stratigraphic and diatom analyses suggest ruptures of the Patton Bay splay fault occurred together with half of the documented great Alaskan megathrust earthquakes during the past 4,200 years.
Posted inResearch Spotlights
The Secret to Mimicking Natural Faults? Plexiglass and Teflon
Researchers found an effective way to produce natural fault behavior in the laboratory.
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GAD is Enough!
An exhaustive study in China finds no need to invoke extreme true polar wander nor anomalous geomagnetic fields in the early Neoproterozoic.
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Greenland Could Have Records of 3.7-billion-year-old Geomagnetic Fields
Scientists argue that paleomagnetic field tests preserve a geomagnetic field record acquired as chemical remnant magnetization in banded iron formations in southwest Greenland.
Posted inResearch Spotlights
How Mantle Movements Shape Earth’s Surface
Two new data sets help researchers tease apart the influences of plate tectonics and mantle movement on surface topography.
Posted inEditors' Highlights
Hydraulic Fractures Are Lazy
The layering of rock masses can help constrain and focus the growth of hydraulic fractures.
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How Earthquakes Grow from a Tiny Fracture to a Catastrophic Event
State-of-art numerical simulations illustrate how a small-scale shear instability can become a giant earthquake in a manner that is consistent with seismological observation.
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What’s Hot in Iceland? A Close Up View of Hotspot-Ridge Interaction
New seafloor magnetic data help scientists retrace the evolution of the Reykjanes Ridge, lending insights into the effects of a mantle plume on mid-ocean ridge organization and evolution.
Posted inEditors' Highlights
A Strong Pacific Plate Bends Under the Hawaiian Volcanic Chain
Two seismic studies reveal the volcanic loads and resulting flexure of the Pacific plate at the Hawaiian Ridge and, surprisingly, show no magmatic underplating.