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What is a surface expression of a plume of magma rising from a stationary source of heat in the mantle?
Wiki User
∙ 13y ago
A hotspot volcano.
Wiki User
∙ 13y ago
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Is the mantle heated mainly by the heat conducted from the core?
No, the main heat source for the mantle (as well as the core) is radioactive decay of elements like uranium within the mantle itself (or core, respectively). Heat rising from the core into the already hot mantle does set up the differential heat profile that drives much of the mantle convection, but even without the additional core heat the mantle would convect (but slower) so that its heat would rise to the crust.
What is the process of upwelling?
Upwelling in biology is the process in which nutrient rich soil that is located deeper in the ocean rises to the surface due to ocean currents and winds. This is important because it allows the organisms living at the surface to get their needed nutriends
How does magma form?
Magma can be formed from the subduction and melting of cold, dense, wet oceanic crust at some convergent plate margins. The moisture in the rock assists in the melting of the crust and the rock surrounding it. Magma is also formed at hot spots in the mantle where hot material undergoes decompression melting as it rises. Decompression melting also occurs at the mid-ocean ridges where new oceanic crust is formed from rising mantle rock.
What does rising sun tattoo symbolize?
The rising sun represents new beginnings
Can dough go down after rising?
yes it can
What are convection currents in the Earth?
Upwelling of hot mantle materials rising to the cooler surface of the mantle. This constant movement, much like water boiling in a pot, creates a current.
Are hot spots stationary?
Yes; hot spots are huge columns of hot mantle material rising from a great depth. New volcanoes form and old volcanoes become extinct as plates move over the hot spots.
What causes the sea floor to change?
Convection currents push the plates around. These are the circulations of the magma in the mantle, caused by the cooler magma at the surface sinking lower into the mantle, heating up, and rising to the surface again. The circular motion acts kind of like a conveyor belt to move the crust about.
What are continent-sized columns of superheated mantle material originating at the core-mantle boundary and rising upward due to a change in density?
mantle plumes
What is price of a david mantle autograph?
25 $$$$$$$$$$ and rising like the star he is
The rising of cold currents to the ocean surface is called?
The rising of the deep cold currents to the ocean surface is called
What are columns of hot rock rising through earth's mantle called?
Plumes.
Can you get to the surface by riding a magmatic eruption all the way from the core to the surface?
No. This could not be done, even assuming you found a way to protect yourself from the immense heat and pressure. Magma forms in the upper mantle, not the core. Pressure in the lower mantle is too high for rock there to melt. During an eruption the magma does not usually come directly from the mantle but from a magma chamber a few miles underground. The mantle does convect, with material rising from near the core-mantle boundary, but this process is very slow; a plume takes about 50 million years to rise from the bottom of the mantle to the top. The core itself is not made of magma either, but metal.
What is a mechanical process that prevents cream from rising to the surface of milk?
what is a mechanical process that prevets cream from rising to the surface of milk?
Is it true that the earth's mantle lies directly below the inner core?
Earth's mantle lies roughly between 30 and 2900 km below the surface, .... decreases more rapidly with height than does a rising hot plume
Explain the sequence of events that cause the movement of the plates on the earths surface use these terms core heat mantle flow rise sideways drag cools?
First the heat below the mantle makes even the solid part of the mantle flow very slowly as though it were very thick liquid. the hot rising part of the mantle cools as it nears the crust. as the cooling mantle moves sideways it drags along the plate floating on top of it. the arrows show the cooled mantle sinking back down. later on the mantle will may be get warm and rise again.
Hot spots are areas of volcanic activity located over rising?
Mantle plumes
