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What does rocks in earths mantle contain a higher percentage of what than rocks in earths crust?
iron and magnesium
What is the earths under crust surrounded by?
Earths under crust surrounded by Upper Mantle (35-60 km) .The mantle is composed of sillicate rocks that are rich in iron and magnesium relative to the overlying crust.
What are the characteristics of earths crust mantle core?
The Mantle--The layer directly below the crust which is delineated from the crust by the Mohorovicic Discontinuity, where seismic waves increase in velocity. The division between the mantle and the crust is a chemical one, the rocks and constituent minerals being higher in magnesium and lower in silicon and aluminum than crustal rocks. The mantle comprises 84% of Earth's volume.
Why are there are almost no extrusive ultra basic rocks in earths crust?
There are almost no extrusive rocks on the earths surface because they are all under the earths surface. They are mainly lower than the earths surface.
What layer of the earth forms the earths plates?
Tectonic plates are floating on the magma (semi-molten rocks) of the mantle layer. Therefore, they form the crust layer of the Earth.
What is extends from inside Earth's crust to the lower atmosphere?
The geosphere extends from the Earth's crust to the lower atmosphere. It includes the solid parts of the Earth, such as the rocks and minerals in the crust, mantle, and core.
What is most of the earths mass in?
Most of the mass of the Earth is in the mantle, most of the rest in the core; the part we inhabit is a tiny fraction of the whole
Why are there almost no extrusive ultra-basic rocks in earths crust?
There are almost no extrusive rocks on the earths surface because they are all under the earths surface. They are mainly lower than the earths surface.
How do upper mantle rock differ from lower mantle rock?
the upper-mantle rocks are heavier while the lower mantle rocks are semisolid like melted plastic
How do upper mantle rocks differ from lower mantle rock?
the upper-mantle rocks are heavier while the lower mantle rocks are semisolid like melted plastic
Is the rock in the crust able to move around more easily than the rock in the lower mantle since the rock in the crust moves around differently than rock in the lower mantle?
The rock in the lower mantle moves around easily than the crust. This is because rock in the lower mantle is hotter and closer to its melting point. Rocks in the crust are cooler thus harder to move around.
What is the area between the mantle and core where hot rocks forced into the crust?
The area is known as the mantle transition zone and it is located between the upper mantle and the lower mantle. This region is characterized by high pressures and temperatures, causing rocks to undergo changes in their physical and chemical properties.
