New research identifies how two vast, hot rock structures in the planet’s mantle produce unusual magnetic activity.

Learn how seismic waves helped identify rare mantle earthquakes deep below Earth’s crust, offering new insight into the ...

The record-breaking mission offers an unprecedented opportunity to study the geology of our planet’s largest layer.

The subduction zones where oceanic plates sink beneath the continents produce volcanic arcs such as those that make up the “rim of fire” around the Pacific Ocean. The volcanoes are fed by molten rock ...

Scientists at Stanford University have created the first global map of earthquakes occurring not in the Earth’s crust, but in ...

(a) Tectonic setting background in the Tonga-Lau-Fiji region. (b) Schematic diagram of the upper mantle structure beneath the Tonga-Lau-Fiji region. A landmark study published in Geoscience—a leading ...

The big picture: Theia is a hypothetical ancient planet that orbited the Sun during the formation of the solar system. According to the giant-impact hypothesis, this protoplanet collided with Earth ...

1. Introduction -- 2. General physical and chemical models of the Earth's lower mantle -- 3. Lower-mantle mineral associations -- 4. Ultramafic lower-mantle mineral associations -- 5. Mafic ...