Investigating Plate Tectonics - Young, Greg
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We live on Earths crust, but there are other layers beneath the crust. They are the mantle and the outer and inner core. In 1915, scientist Alfred Wegener said that about 200 million years ago, Earth once had a single landmass. Hot, molten magma under the surface of the crust pushed the plates apart at a crack in Earths crust and, eventually, the landmass was split apart and continents were formed. Wegeners work led to the study of plate tectonics.

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Produktbeschreibung
We live on Earths crust, but there are other layers beneath the crust. They are the mantle and the outer and inner core. In 1915, scientist Alfred Wegener said that about 200 million years ago, Earth once had a single landmass. Hot, molten magma under the surface of the crust pushed the plates apart at a crack in Earths crust and, eventually, the landmass was split apart and continents were formed. Wegeners work led to the study of plate tectonics.