Sentences with phrase «underlying mantle»

During the last ice age, a mile - high North American ice sheet, that stretched as far south as Long Island, N.Y., piled so much weight on the Earth that underlying mantle rock flowed slowly outward, away from the ice.

Four years before the Russians started punching their way into the Kola crust, the United States had given up on its own deep - drilling program: Project Mohole, an attempt to bore several miles through the Pacific seafloor and retrieve a sample of the underlying mantle.

«In turn, these reservoirs are fed from deeper layers in the earth's crust and the underlying mantle.

Driven by circulation in the underlying mantle, the plates slid past each other, pulled apart, or collided.

Using ricocheted vibrations from dynamite blasts, researchers have glimpsed a layer of gooey material sandwiched between the Pacific tectonic plate and the underlying mantle.

SLIP «N SLIDE A layer of slippery, partially melted rock (red) may separate the Pacific tectonic plate from the underlying mantle, reducing the amount of force required to shift the massive plate, new seismic research suggests.

«The gravity field led us to suspect the region might be pushed up from below so we started looking at the underlying mantle: the layer of rock between the Earth's core and its crust,» said Professor Müller.

«A weak, slippery base essentially decouples the plate from the sticky, underlying mantle,» says lead author Tim Stern, a geophysicist at Victoria University of Wellington in New Zealand.

The technique enabled them to determine the plate's thickness, and to image the interior of the plate and the underlying mantle (the layer between the Earth's crust and outer core), which they were able to relate to the direction of flow of rocks in the mantle.

It allows the outer shell to slip across the underlying mantle, Rowley says.

Because the crust is lighter than the underlying mantle, gravity signals reveal variations in the thickness of the crust that were caused by tidal heating.

The oceanic crust moves away from the mid-ocean-ridges and ultimately gets transported back into the underlying mantle through «subduction» at ocean trenches.

Recent studies have proposed that the bathymetric fabric of the seafloor formed at mid-ocean ridges records rapid (23,000 to 100,000 years) fluctuations in ridge magma supply caused by sealevel changes that modulate melt production in the underlying mantle.

The boundary between the Earth's outermost layer, the crust, and the underlying mantle is speckled with mysterious, blob - like regions.

The East African Rift is described as an active type of rift, in which the source of these stresses lies in the circulation of the underlying mantle.

Seismic stations record data that allows us to understand the properties of the Earth's interior, like the strength of the crust and underlying mantle, giving us a more complete understanding of how the Earth is responding to changes in the ice sheets.

Abstract: Post-glacial uplift and convection in the underlying mantle uplift in the Hudson Bay area (as reflected in the changes of the area's gravity and magnetic intensity) are making significant contribution to the Davis Straits rate of flow, affecting composition of the Labrador current and further the Subpolar gyre's circulation, which is the engine of the heat transport across the North Atlantic Ocean and very relevant to the Atlantic basin climate.

However, the weight of the ice also pushed the continent down into the underlying mantle at B.

However, these motions can be obscured by episodes of glacial advance or retreat that occurred hundreds to thousands of years ago3, 4,5,6, which trigger a delayed response because of viscous flow in the underlying mantle.