Sentences with phrase «mantle material»

When the crust rebounds, it carries higher - density mantle materials up toward the surface and holds them there.

The research suggests, for example, that finding pristine mantle material in the middle of the basin might be a bit tricky because of the large volcanic deposit.

«The melting we see appears to be driven by subduction — the downwelling of mantle material from the surface.»

The ongoing flux of mantle material into areas which have experienced large - scale ice - mass loss since the LGM looks like mass gain to GRACE.

«This new constraint on plume structure has important implications for how deep mantle material is entrained in plumes, and it gives us the clearest picture yet for the chemical structure of an upwelling mantle plume.»

Convection, or the flow of mantle material transporting heat, drives plate tectonics.

Earth's moon probably formed when a large body collided with the young planet and sent hot mantle material flying into space.

One of the leading explanations would have beggared the imaginations of even the most inventive medieval mapmakers: Primordial collisions between the young Earth and other protoplanets forced mantle material into the core, providing the heat that kick - started Earth's geodynamo.

The ridges form when mantle material melts, rises into the cracks between tectonic plates, and solidifies again.

If the impact did excavate mantle material, and it doesn't contain olivine, that would have substantial implications for models of how the Moon was formed, Moriarty said.

In August those efforts paid off when a group of geologists led by Matthew Jackson, now at Boston University, identified a reservoir of primitive mantle material that is 4.5 billion years old — almost as old as the planet itself.

They rise up to the lithosphere, bringing with them hot partially molten mantle material that causes the lithosphere to weaken and deform.

Fouch thinks Yellowstone's restless activity is driven not by a giant mantle plume but rather by mantle material being pushed around the edge of the stranded Farallon fragment.

The upwelling of large amounts of hot mantle material produces regions of crustal and mantle rocks with different seismic velocities (with respect to the surrounding, unaffected regions).

They are often attributed to upwelling of hot, deeply sourced mantle material, or «mantle plumes.»

Because of the tremendous pressure in the mantle from overlying rock, geologists believe mantle material wouldn't melt until it rose up enough to reach around 40 miles (70 kilometers) below Earth's surface.

Visiting SPA and grabbing a sample of that exposed mantle material could provide critical clues about the Moon's origin and evolution.

The plumes that originate at the core - mantle boundary may have greater density or may simply be caused by thermal instability between the molten iron core and the cooler mantle material surrounding it.

To simulate the extreme subterranean environment, Fiquet and colleagues put samples of typical mantle materials — magnesium oxides, iron, and silicon — into diamond anvil cells, small chambers in which microscopic samples get crushed between two diamonds.

Colliding at speeds up to 22,000 miles per hour (36,000 kilometers per hour), such a collision may have stripped most of the rocky mantle from the protoplanet that became Mercury with its iron - rich core, while a Mars - size protoplanet struck the early Earth off - center and created a spray of mostly mantle material that later accreted to form the Moon.

An ancient eruption, like the recent Holuhraun eruption in Iceland, brought up deep mantle material that contains clues about the origin of Earth's water.

Along with fellow graduate student Mingming Li and Professional Research Associate Matthijs van Soest, the researchers depict a model Earth, where in its interior resides distinct reservoirs of mantle material that may have formed during the earliest stages of Earth's evolution.

A model of the flows in Earth's mantle below North America, developed by the scientists, reveals that the mantle material below 200 kilometers flows westward at a velocity of about 4 millimeters per year.

The chemical composition of basalts differs depending upon the temperature and composition of the mantle material from which they're derived.

One of the four craters, located toward the outer edge of the basin, contained several distinct mineral deposits within its own peak, possibly due to sampling a mixture of both upper and lower crust or mantle materials.

Crustal material is much cooler than mantle material, and therefore denser.

The rate of rebound, however, depends on the viscosity of the mantle material, which in turn depends on temperature.

Because the mantle material is viscous, it can take thousands of years for this process to complete itself and for the crust to reach equilibrium.

Once the ice melted, the crust began to slowly rebound and the mantle material to flow back under the now - iceless area.

So if you're looking for mantle, it might be wise to land in the ring surrounding the center, where what appears to be mantle material is highly concentrated.

Because all the hafnium - 182 decayed to tungsten - 182 during the first 50 million years of Solar System history, these findings indicate that the mantle material that melted to form the flood basalt rocks that the team studied originally had more hafnium than the rest of the mantle.

Begin by adding a warm, wool or flannel piece of material and then add a large item, such as skates (purchased at Goodwill for about $ 2) to one end of your mantle