Sentences with phrase «rock fragments»

At least one team has discovered water - rich rock fragments in volcanic debris originating from the mantle.

When rock fragments fall into the magma chamber, all fluids inside boil instantly.

When rock fragments fall into the magma chamber, they are rapidly heated by several hundred degrees, and all fluids inside boil instantly.

«We show that rock fragments from the roof of the magma chambers could have been expelled, similar to popcorn that is thrown out of a hot pan!

Rock fragments belched up by volcanic eruptions suggest that the rigid rock of the continents extends about 175 kilometers underground, where it sits atop slightly runnier material in Earth's mantle.

One possibility is that the eruption column of hot volcanic ash, gas and rock fragments now extending into the sky above the summit could collapse into what's called a pyroclastic flow and race down the flanks of the mountain.

In Cameron's most promising simulations, the ejected rock fragments into minute particles that encircle Earth in a spiral - shaped ring.

This could mean that it is similar to water - rich objects in the outer edge of the asteroid belt, or it could mean that Phobos is a rubble pile, with many empty cavities between rock fragments.

Loy too has high hopes that he will be able to use rock fragments carrying plant residues.

Players take on the role of an unnamed astronaut who stumbles upon a creepy, derelict space station filled with cryptic logs and large rock fragments that communicate telepathically.

The mountain — far from issuing a benign puff of ash — was spewing out a fountain of lava, flinging enormous molten rock fragments miles into the sky.

Heinrich events are marked in marine sediments by conspicuous layers of iceberg - transported rock fragments.

The Almahata Sitta meteorites, a few hundred rock fragments that rained down on Sudan's Nubian Desert in 2008, included a number of coarse - grained, carbon - rich fragments known as ureilites.

Rock fragments will clump at the base, and because they are denser than the ice - rock mixture beneath, would slowly sink to the core of a moon.

French and US scientists observed images and chemical results of 22 of these rock fragments.

This eruption cloud of gases and rock fragments was released by the Mount Augustine volcano in Alaska during an eruption in 1986.

The floating rock fragments are then found among the erupted volcanic rocks, instead of inside the frozen magma chambers as previously expected.

The rock fragments are full of bubbles and have very low densities, and they look a lot like popcorn,» says Steffi Burchardt, researcher at the Department of Earth Sciences, Uppsala University.

Furthermore, the gases released from the rock fragments as they boil also contribute to a higher pressure in the magma which can help explain some of the more explosive eruptions.

Steffi and her colleagues have now managed to show how the popcorn - effect makes the rock fragments float and rise to the top of magma chambers rather than sink to the bottom.

Flows usually consist of two parts: the basal flow hugs the ground and contains larger, coarse boulders and rock fragments, while an ash cloud rises above it because of the turbulence between the flow and the overlying air.

The red - centered rock that seemingly appeared out of nowhere on January 8 is apparently a rock fragment dislodged by the Mars Exploration Rover's passing.

Grains of sediment, rock fragments and fossils can be replaced by other minerals during diagenesis.

[* Professor's note: A talus is a sloping pile of rock fragments at the foot of a cliff; a scree is an accumulation of pebbles or rock fragments at the base of a steep slope.]

These rock fragments are actually quartz crystals that visitors are allowed to take from the beach as souvenirs.