Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust ...

The deep roots of Earth's oldest continents have long been thought to be unshakable. But a new seismic discovery suggests that even these stable landmasses can change. Beneath the center of North ...

One of these slabs currently straddles the boundary between the mantle transition zone and the ... has a high seismic velocity (dark blue) compared to its surroundings. | Credit: Hua et al.

Seismic imaging reveals a funnel-shaped ... drip-like structures extending from the base of the craton into the mantle transition zone, an area roughly 400 to 700 kilometres below Earth's surface.

Between depths of 410 and 660 kilometers lies the mantle transition zone ... large scale ocean bottom seismic experiment conducted at an Atlantic subduction zone," said Dr. Catherine Rychert ...

A fascinating new study reveals that a massive chunk of Earth’s crust, buried deep beneath the Midwest, is slowly pulling ...

"Because of the use of this full-waveform method, we have a better representation of that important zone between the deep mantle and ... black—as revealed by seismic velocity measurements.

Abstract: The structure of seismic discontinuities in the mantle transition zone at depths of about 400 and 670 km provides important constraints on mantle convection as the associated mineral phase ...