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Layers of Earth. Crust . The outer most layer of Earth Made of Oxygen, silicon and aluminum . Oceanic Crust. Made of basalt Younger, more dense, thinner. Continental Crust. Made of granite Older, less dense, thicker. Mantle. Solid plastic-like rock 1800 miles thick
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Crust • The outer most layer of Earth • Made of Oxygen, silicon and aluminum
Oceanic Crust • Made of basalt • Younger, more dense, thinner
Continental Crust • Made of granite • Older, less dense, thicker
Mantle • Solid plastic-like rock • 1800 miles thick • Convection currents supply most of Earth’s internal heat
Outer Core • Made of liquid metal: iron and nickel • 1400 miles thick • Creates Earth’s magnetic field
Inner Core • Made of solid iron • 800 miles • Slowly cooling and getting larger
Holes • Man has explored the Earth to a depth of 7.6 miles
Kola Superdeep Borehole: Russia • Largest hole ever dug: scientific expedition • 12,262 meters (7.6 miles)
The temperature at this depth was 180°C (356°F), at which point the rock became more like a plastic than a solid, stopping further drilling
Argyle Diamond Mine: Australia • Largest hand dug hole in the world • Largest volume of diamonds produced • 600 meters (1,970 ft)
