Structure of the Interior

Structure of the Interior - Structure of the Interior...

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Structure of the Interior Accumulated and detailed seismic studies, coupled with theoretical speculation, suggests the interior structure shown schematically on the left (the figure is not to scale). The Earth is believed to have a solid inner core , made mostly of iron and nickel. This is surrounded by a liquid outer core , also mostly iron and nickel. The diameter of the core is estimated to be 7000 km, compared with a 12,700 km diameter for the entire planet. The crust is only a few tens of kilometers thick. The region between the core and the crust is called the mantle . The upper part of the mantle and the crust together are called the lithosphere . Sitting just below the lithosphere is a region of plastic consistency called the aesthenosphere . We shall have more to say about the lithosphere and aesthenosphere shortly. Geological Differentiation The Earth did not have the interior structure described in the preceding section when it was formed. The geological process by which the Earth came to have its
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Structure of the Interior - Structure of the Interior...

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