Last week we studied the inside structure of the earth.
It is made of crust,mantle,outer core and core.
The sea crust is 5~10km deep.Headpiece is basalt.Underpart is gabbro.
The mainland is 30~50km deep.middle part and head part are granite and argillaceous slate.Underpart is gabbor and basalt.
Although I am studying management，I am interested in geoscience.
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