MANTLE - Intermediate zone within a planet between the crust and metallic core. The mantle accounts for 82% of Earth's volume and is composed of silicate minerals rich in Mg. The temperature of the mantle can be as high as 3,700 °C.
Mantle
The Earth's mantle extends to a depth of 2,900 km. The pressure, at the bottom of the mantle, is ~1.4 Matm (140 GPa). It is largely composed of substances rich in iron and magnesium.
mantle Layer of the Earth just interior to the crust.
mare Relatively dark-colored and smooth region on the surface of the Moon.
mass A measure of the total amount of matter contained within an object.
mantle
the portion of a planet's interior above the core but below the crust
mare ...
MANTLE
The middle layer of a planet located between the crust, or surface, and the core.
MASS
The measure of the amount of matter in an object.
Mantle: A mostly solid layer of Earth lying beneath the crust and above the core; consisting mostly of iron, magnesium, silicon, and oxygen. On other planets and moons, the mantle is the layer between the crust and core.
Mantle
The layer of dense rock and metal oxides that lies between the molten core and the surface of the earth; also, similar layers in other planets.
Mare ...
Mantle - The part of a planet lying between its crust and its core
Maria - A dark, smooth region on the Moon formed by flows of basaltic lava ...
Fremantle is a port city in Western Australia, located southwest of Perth, Western Australia, the state capital, at the mouth of the Swan River on Australia's western coast....
and the state's capital, Perth.
mantle - a rocky layer located under the crust - it is composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. Convection (heat) currents carry heat from the hot inner mantle to the cooler outer mantle.
Mantle Convection
This image shows a computer simulation of processes in the interior of Mars that could have produced the Tharsis region. The color differences are variations in temperature.
Mantles in portable gas lights. These mantles glow with a dazzling light (unrelated to radioactivity) when heated in a gas flame.
Used to control the grain size of tungsten used for electric lamps.
Used for high-temperature laboratory crucibles.
Mantle: Beneath the crust it is a mantle (also made of silicate rocks) that is hundreds of kilometers thick.
Mantle
The interior region of a terrestrial (rocky) planet or other solid body that is below the crust and above the core.
Maria ...
MANTLE
The mantle is the layer of the Earth (or other planet) located between the crust and the molten core.
...
mantle -- The main bulk of a planet between the crust and the core; on Earth, the mantle ranges from about 40 to 2,900 kilometers (25 to 1800 miles) below the surface.
mare -- A dark, low-lying lunar plain, filled to some depth with volcanic rocks.
- Mantle Field Radiation - What is a Mantle Field?
- Collimated Beam - Definition of Collimated Beam Radiation Therapy for Breast Cancer
- Radiation Exposure and Colon Cancer - Radiation Exposure Increases Colorectal Cancer Risk ...
The mantle has a low silica content and siderophile enrichment with olivine and pyroxene widespread. Discontinuities produced by changes in mineral phases are also present.
The mantle makes up the majority of the Earth's volume and mass, and consists of molten rock 1,802 miles thick.
The Earth's core is 2,200 miles thick, and is composed mainly of iron, partly liquid and partly solid.
Mineralogy ...
The mantle is made of hot but not quite molten iron-rich silicate minerals like olivine and pyroxene and is around 2800 kilometers thick. The density increases from about 3.5 below the crust to over 5 at the core boundary.
The mantle of unconsolidated fragmental material that covers a land surface; i.e., soil and fractured rock.
relativistic - (n.) ...
(a) Mantle of gases round a star planet or moon, sometimes even forming the apparent surface of the body. For a body to retain an atmosphere depends on the body's gravity, and the temperature and composition of the gases.
A 'rubble mantle' forms when sunlight heats the surface of the nucleus and sublimates the ice. Small dust particles are carried into the coma along with the gas, leaving large rocks (red) too heavy to be lifted as a rubble mantle.
Because the mantle is fluid, and because it is hot, it can convect. To overcome the high viscosity takes a lot of heat, supplied by radioactive uranium, thorium, and potassium in a sort of slow-simmering nuclear reactor.
Name: Mizar (="mantle" or "belt") + Alcor (="humbled one"; called "Little Rider" in German)
God Warriors: Syd + Bud
Info: Zeta UMa is a double star that was often used to test the eyes. Sometimes it's called "Horse and Rider".
The planetary crusts are on top of the mantle and are modified by various processes of weathering, sedimentation, metamorphosis, volcanism, and bombardment by meteorites.
533 billion years ago (4.533 Ga); Theia is thought to have struck the Earth at an oblique angle, destroying Theia and ejecting most of Theia's mantle and a significant portion of the Earth's mantle into space, ...
Once in a while, a truly massive plume of hot rock from the Earth's mantle can erupt through the crust for centuries or even millenia, producing acid rains, destruction of the ozone layer from emissions of chlorine-bearing compounds, ...
The increasing pressure with depth causes phase changes in crustal rocks at depths of roughly 60 kilometres, marking the boundary of the upper mantle.
Diffraction of seismic waves provided the first clear-cut evidence for a lunar crust, mantle, and core analogous to those of the earth. The lunar crust is about 45 mi (70 km) thick, making the moon a rigid solid to a greater depth than the earth.
There is the fact that the composition is very similar to the Earth's mantle, and the fact that in the past the Moon was much closer to the Earth. The lack of water in the rocks and regolith also tells us something about the way that it formed.
Earth’s mantle
Equator (geography)
Hubble Space Telescope (HST) (astronomy)
atmosphere (gaseous envelope)
atmospheric electricity
climate (meteorology)
dust
dwarf planet (astronomy)
geochemical cycle
geographic pole (geography) ...
After the release of Star Trek: Insurrection, Patrick Stewart commented, "I think we should pass the mantle on to the Deep Space Nine characters. We don't want to become The Rolling Stones of the Star Trek films". [6] [7] ...
Computer modelling of the collision between the Earth and the Mars sized impactor shows that the bulk of the mantle of the impacting object and a proportion of the Earth's silicate mantle were ejected into Earth orbit and coalesced to form the Moon.
This caused the differentiation into crust, mantle, and core, with the lighter silicates moving up and outward to form the mantle and crust and the heavier elements, mainly iron and nickel, ...
The lower mantle is probably mostly silicon, magnesium and oxygen with some iron, calcium and aluminum. The upper mantle is mostly olivene and pyroxene (iron/magnesium silicates), calcium and aluminum.
However, the similarity in size and density between Venus and Earth suggests that they share a similar internal structure: a core, mantle, and crust.
The heating seems to be confined to the mantle and caused by the small amount of radioactive uranium, thorium and potassium, elements whose decay time is billions of years.
But studying the radioactive decay of elements in the mantle, specifically hafnium-182 to tungsten-182, to home in on Mars' age yielded a wide range of answers because they are derived from meteorites that were produced during melting events, ...
The uranium, thorium, and potassium, in particular were used to map the location of KREEP (potassium, rare-earth element, and phosphorus containing material, which is believed to have developed late in the formation of the crust and upper mantle, ...
The uppermost layer of the mantle of a rocky planet, located below the lithosphere. On Earth, this zone of soft, easily deformed rock lies at depths of about 100 to 250 km.
Our present picture of the Moon's interior is that it has a crust about 65 km thick, a mantle about 1000 km thick, and a core that is about 500 km in radius. A limited amount of seismic data suggests that the outer core may be molten.
Our home planet is also unique in having large oceans of surface water, an oxygen-rich atmosphere, and shifting crustal sections floating on a hot mantle below, described by the theory of plate tectonics.
The cores of the terrestrial planets are all about the same size in relation to their total diameters, but the mantle of Mercury is proportionally smaller than the mantles of the other three planets.
The interior of Venus is believed to be similar to that of the Earth with a metallic core and silicate mantle. Unlike the Earth, Venus has a very small magnetic field apart from that induced by the effect of the solar wind.
Seeing Venus ...
Beneath the surface. Ganymede may be like Callisto with a crust of rock and ice, a water-ice mantle, and a rocky core.
The moon has a low density, which suggests the core takes up about half of the satellite's diameter.
Definition: plate tectonics: A geological model in which the Earth's lithosphere (crust and uppermost mantle) is divided into a number of more-or-less rigid segments which move in relation to one another.
The Earth is made up of several layers. There is an outer solid crust, then a mantle, then a liquid outer core, and finally a solid inner core.
Retention and escalation of temperature beneath a mantle of clouds or denser atmosphere. [A84]
Greenwich ...
Hot Spot
center of persistent volcanism, thought to be the surface expression of a rising hot plume in Earth's mantle.
Astronomers believe that the Moon was formed billions of years ago when a small planet the size of Mars collided with the Earth. The foreign planet hit with a glancing blow and ejected a large part of the Earth's molten mantle into space.
The inner core is believed to be solid and the outer core is liquid. The major heat source of the core is the natural radioactivity in the Earth. Outside the core is the mantle, which is partially melted.
The comet theory still has its partisans, who reply that chemical analyses of the area have showed it to be enriched in cometary material, and suggest that the comet might have been extinct and had formed a tough "mantle" that allowed it to ...
Dust grains are roughly 30 nm in size although they may also have a mantle of ice or frozen ammonia on them, increasing their size tenfold.
 See also: Earth, Planet, Solar, Time, Light
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