The earths crust is very thin.

HOW THICK IS IT?

• It is 5-7 km thick
• It is often compared to the paper thin skin of an onion

OCEANIC CRUST IS THE CRUST BENEATH THE OCEAN

BASALT

• Dark
• Fine texture

What is the continental crust?
It is the crust that forms beneath the continents.

GRANITE

• Usally light colored
• Coarse texture

THE MANTLE

• Solid
• Thick

HOW THICK IS IT....EVEN THICKER

LITHOSPHERE

• The uppermost layer
• In greek lithos means stone
• 100 km thick

ASTHENOSPHERE

• In greek means weak
• This layer is somewhat soft

LOWER MANTLE

• Solid
• Extends all the way to the core