Layers of Earth
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Transcript of Layers of Earth
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 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
Earth’s Layers
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)
Chuquicamata: Chile
Udachnaya: Russia
Sinkhole: Guatemala
Diavik Mine: Canada
Mirny Diamond Mine: Russia
Great Blue Hole: Belize
Dean’s Blue Hole
Zacatón: Mexico
Bingham Canyon Mine: Utah
Monticello Dam, California
Kimberly Diamond Mine: South Africa
Masaya Shield Volcano: Nicaragua
Darvaza:Turkmenistan