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What s the process where crust is forced into the asthenosphere?
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Is S-wave passes through asthenosphere?
yes
What is the formation process of zirconium?
The S-process.
What tectonic plate is primarily comprised of seafloor crust?
Divergent plate boundaries are often found on the ocean floorâ??s crust. These are the type of tectonic plates that produce volcanoes and rifts.
What wave moves through the ground and causes it to compress and then expand?
The fastest waves shaking the ground like an accordeon (contraction and expansion) are the P waves. They have a global velocity of 5.5km/s in the crust while S waves moves at velocities around 3.2 km/s in the crust. Then you have surface waves (rayleigh and Love) which propagates only in the crust at velocities smaller than the S waves velocity.
Explain how the processes of sea-floor spreading and magnetic reversal produce bands of oceanic crust that have different magnetic polarities?
Based on earth's magnetic field, new oceanic crust that is created is polarized one way or the other at creation. The new crust is created by gaps between oceanic plates where magma comes out and hardens. This crust is pushed away from the spreading center by a few processes (if you want to learn more look up slab pull, slab suction and, most importantly, ridge push). Lets say the crust that is being created at a spreading center can have polarization N (north) or S (south). First crust with polarization N comes out, then after the magnetic poles flip crust with polarization S is coming out. This alternation of the crust that is being pushed from the spreading center causes the bands. You should look at some diagrams to understand it better.
Is S-wave passes through asthenosphere?
yes
The change in velocity of s waves at the top of the asthenosphere suggests that it is?
S waves can only travel though solids. Since they have difficulty traveling through the asthenosphere, we conclude the athenosphere is at least partially fluid.
Why are the crust and upper mantle taken as one layer?
People often confuse the terms 'lithosphere' and 'crust'. The crust is indeed part of the lithosphere, and the lithosphere [minus the crust] is an extension of the mantle.The distinguishing factor between lithospheric (rock-sphere) mantle and the asthenospheric (soft-sphere) mantle is not compositional, but mainly related to temperature and density.At ocean spreading centers, where new lithosphere forms, there is no sharp contrast between the new, warm, thin lithosphere and the upwelling asthenosphere below. In the old, cool, dense lithosphere that makes up ocean basins, the difference between the 'layers' is quite distinguishable.If you look at it from this perspective, the crust is simply coasting atop the lithosphere, getting a free ride. It is the behavior of the mantle, which comprises both the lithosphere and asthenosphere, that controls how plates form, move, and subduct. So yes, the crust is part of the lithosphere, in that it is made up of rocks.Source(s):I'm a geologist/physicist. BLANCHE MARIE PUEBLAS :)
What s the hard layer of the earth?
The Crust
What are some interesting facts about asthenosphere?
by low-density, semiplastic (or partially molten) rock material chemically similar to the overlying lithosphere. The upper part of the asthenosphere is believed to be the zone upon which the great rigid and brittle lithospheric plates of the earth's crust move about (see plate tectonics). The asthenosphere is generally located between 45—155 miles (72—250 km) beneath the earth's surface, though under the oceans it is usually much nearer the surface and at mid-ocean ridges rises to within a few miles of the ocean floor. Although its presence was suspected as early as 1926, the worldwide occurrence of the plastic zone was confirmed by analyses of earthquake waves from the Chilean earthquake of May 22, 1960. The seismic waves, the speed of which decreases with the softness of the medium, passed relatively slowly though the asthenosphere, thus it was given the name Low Velocity zone, or the Seismic Wave Guide (see seismology). Deep-zone earthquakes, i.e., those that occur in the asthenosphere or below it, may be caused by crustal plates sinking into the mantle along convergent crustal boundaries.
Is the Moon's crust thicker than Earth's?
yes. Earths crust is 20 miles thick and the moon"s crust is 40 miles thick.
What is a pastry beginning with s?
Short crust pastry.
What is the hollow spaces in earth 's crust?
Canyo
Where is gold come from?
gold comes from the earth,s crust
Why were children in the 1800's forced to work in the US?
Chlidren were forced to work in the 1800's because they were poor, and they needed to take care of their families
What do you call the breaking and vibrating of earth 's crust?
seismic waves
What is a 4 letter word for earth's crust beginning with s?
solo
