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

http://upload.wikimedia.org/wikipedia/commons/c/c6/Bingham_Canyon_Mine_1942c.jpg

Monticello Dam, California

Kimberly Diamond Mine: South Africa

Masaya Shield Volcano: Nicaragua

http://upload.wikimedia.org/wikipedia/commons/4/40/Volcan_Masaya2.jpg

Darvaza:Turkmenistan

http://upload.wikimedia.org/wikipedia/commons/6/65/The_Door_to_Hell.jpg