Earth Internal Structures
It is composed by the following layers:
Nucleus: Earth central portion. Thickness of 3.470 km and 6.000°C of temperature.
Pasty Magna: corresponds to the portion below the terrestrial crust. It can be divided in mantle (below the sima, thickness of 1.200 km) and intermediary layer (called external nucleus, thickness of 1.700 km).
Crust or Litosphere: Earth external layer, in that surface happens erosions and sedimentations. Thickness of 60 km in the mountainous areas and 5 to 10 km in the oceanic basins.
Subdivided in sial (soil and underground) and sima (superficial mantle - litosphere internal portion).
از اینجا
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