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What is the earth's outer core made of?

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The outer core of the Earth is a fluid layer about 2,400 km (1,500 mi) thick and composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. Its outer boundary lies 2,890 km (1,800 mi) beneath Earth's surface. read more

Just recently, scientists discovered a continent-sized liquid metal “dragon” making its way around the Earth’s outer core. Now, it seems as if the inner core is taking center stage, as researchers have finally found out what it’s completely made of. read more

The Earth’s Outer Core Traveling still deeper within the Earth, we next would encounter the Earth’s outer core, which extends to a depth of around 3000 mile (4828km) beneath the surface. It is believed that this outer core is made up of super-heated liquid molten lava. read more

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