A peak in seismic P-wave – S-wave velocity ratios at the lithosphere-asthenosphere boundary beneath old Pacific lithosphere requires an additional property besides temperature as an explanation.
Earth's crust
Posted inNews
Search for MH370 Revealed Ocean Crust Waves
Efforts to recover the missing airplane produced high-resolution bathymetry of the southern Indian Ocean that raises new ideas about how ocean crust forms.
Posted inNews
Cold Cuts: Glaciers Sculpt Steep Peaks
In environments raked by glaciers, tall peaks like Denali still survive, held up by surprisingly thin crust.
Posted inNews
Microbes Discovered Hanging Out in the Ocean’s Crust
“The lower ocean crust is one of the last frontiers of the exploration for life on Earth.”
Posted inEditors' Vox
Measuring Explosive Events on Earth from the Ionosphere
Natural and manmade explosive events occurring on or below the Earth’s surface can be measured remotely in different ways and different places from the ionosphere.
Posted inNews
Did Global Glaciation Cause the Great Unconformity?
In a new study, researchers make the case that large-scale glaciation during parts of the Neoproterozoic era led to extensive erosion of Earth’s crust.
Posted inEditors' Highlights
New Global Crustal Model Built as Foundation for Future Studies
A new global crustal model and its corresponding uncertainty were obtained using minimum a priori information and a geostatistical approach.
Posted inScience Updates
Understanding Electrical Signals from Below Earth’s Surface
A new version of a free Web application (SIGMELTS 2.0) helps Earth scientists interpret electrical anomalies in Earth’s crust and mantle and track the sources of earthquakes and volcanic eruptions.
Posted inResearch Spotlights
A More Detailed Look at Earth’s Most Poorly Understood Crust
The second-generation Antarctic Digital Magnetic Anomaly Project offers a powerful new tool for probing the structure and evolution of the southernmost continent’s lithosphere.
Posted inEditors' Highlights
Carbonate Melting Enhances Mantle CO2 Fluxes in Old Ocean Basins
The amount of CO2 segregated from the mantle by carbonate melting beneath old oceanic crust may equal that emitted along the mid-ocean ridge system, thereby contributing to the global carbon cycle.