Earth Interior Layers

The layers are the crust mantle inner core and outer core.

Earth interior layers. Oceanic crust mostly basalt. The crust silicate rocks primarily granite and basalt. Scientific understanding of the internal structure of earth is based on observations of topography and bathymetry observations of rock in outcrop samples brought to the surface from greater depths by volcanoes or volcanic activity analysis of the seismic waves that pass t.

P waves speed up when rocks change density. P waves and s waves are deflected. The hard brittle crust extends from earth s surface to the so called mohorovicic discontinuity nicknamed the moho the moho is not located at a uniform depth but about 10 kilometers 6 miles below the seafloor and about 35 kilometers 22 miles beneath the surface of continents.

At the center of the earth is its extremely hot core. Earth comprises four separate layers. Peel back one and you find.

Due to this the outermost layer is made of the lightest materials such as rocks and granites and the innermost layer consists of nickel and iron. Continental crust igneous metamorphic and sedimentary rocks. The earth is made up of four primary layers that exist in a spherical structure resembling an onion.

This is how the mantle crust boundary was. Let s start from the inside and work our way out. The earth s interior is composed of four layers three solid and one liquid not magma but molten metal nearly as hot as the surface of the sun.

The crust the mantle and the core as shown in the diagram of the earths interior below. Most of the geologist believes that as the earth cooled the heavier and the denser material sank into the centre and the lighter ones rose towards the top. Like all terrestrial planets the earth s interior is differentiated.