From the origin of diamonds to the location of deep-seated volcanoes, IE walks you through the layers of the Earth's interior, which support all life now known to exist.
RobertKacpura/iStockDiamonds are formed at a profound depth of at least 150 kilometers. Scientists know this by examining an ultramafic xenolith called
While the nature of this layer is still unknown, scientists have some hypotheses . Some believe that this layer is the place where the subducted oceanic slabs eventually settle. In contrast, some believe that it is the origin of the mantle.In areas where the heat flux from the core of the Earth is greater, cylindrical areas of hot rising mantle initiate from within the D" layer.
The outer core's density is estimated to be much higher than the mantle or thin crust, ranging between 9,900 and 12,200 kg/m3. Since this layer is a liquid, it can easily convect, carrying heat into the mantle through the D″ layer.Andrew Z. Colvin/Wikimedia CommonsThis convection current is further modified into large cylindrical helices due to the Earth's rotation.
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