LAYERS OF EARTH Crust The outer most layer

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