A long-lost slab of Earth’s crust may be pulling away the bottom of the oldest part of North America, scientists say ...

North America is dripping—with sizable blobs of rock sinking from the underside of the continent, beneath the U.S. Midwest, ...

Even the oldest and most stable of lithospheric structures can’t withstand geologic machinations deep within the Earth.

Related: Earth's crust is peeling away under California The researchers ... tectonic plate called the Farallon plate. The Farallon plate and the North American plate once formed a subduction ...

Southern California is prone to big earthquakes because of a tectonic plate boundary that runs up and down the state's ...

To the west of the fault is the Pacific plate, which is moving northwest. To the east is the North American Plate, which is moving southeast. Los Angeles, located on the Pacific plate, is now 340 ...

The Farallon plate and the North American plate once formed a subduction zone along the continent's west coast, with the former sliding beneath the latter and recycling its material into the mantle.