An analysis of a seismic and gravity anomaly discovered in the middle mantle sheds new light on ancient oceans, the mantle's evolution, and ancient magmatism in the Arctic.
Earth’s interior
Posted inResearch Spotlights
Massive Ancient Tectonic Slab Found Below the Indian Ocean
Scientists discover a surprisingly positioned tectonic plate, buried below the southern Indian Ocean, that spans the entire mantle.
Posted inEditors' Vox
Frontiers in Geosystems: Solving the Puzzles
Putting some publishing action into deep Earth-surface interactions
Posted inResearch Spotlights
Variable Mantle Lies Below Ancient Pieces of Earth's Crust
Underneath old and stable pieces of Earth's crust in North America, the mantle's uppermost portion contains multiple layers that change the velocities of seismic waves.
Posted inResearch Spotlights
Improved Models of Wind Flow over Mountains
A new approach for representing areas of low-lying mountains improves the simulation of atmospheric flow over gentle topography without increasing computational requirements.
Posted inResearch Spotlights
P Wave Amplitude Decay Offers a Glimpse of Earth's Structure
Scientists look at deep earthquake signals to map how seismic waves lose energy in the upper mantle across the United States.
Posted inAGU News
Peter Olson Receives 2015 Inge Lehmann Medal
Peter Olson was awarded the 2015 Inge Lehmann Medal at the American Geophysical Union Fall Meeting Honors Ceremony, held on 16 December 2015 in San Francisco, Calif. The medal is for "outstanding contributions to the understanding of the structure, composition, and dynamics of the Earth's mantle and core."
Posted inScience Updates
UAE-Oman Mountains Give Clues to Oceanic Crust and Mantle Rocks
When oceanic plates meet continental plates, the continental plates usually come out on top. Cases where this is reversed provide valuable access to oceanic crust and mantle materials.
Posted inNews
Earth's Water Came from Space Dust During Planetary Formation
A new analysis of lava from the deep mantle indicates that water-soaked dust particles, rather than a barrage of icy comets, asteroids, or other bodies, delivered water to the newly forming Earth.
Posted inResearch Spotlights
North America Does the Wave (Slowly)
Data-driven modeling helps explain how convection currents in Earth's mantle influence the rise and fall of surface features, but these models are in an early stage.