LAYER’ ^:;%^v

/ COMPOSITION. r

DEPTH; p

PROPERT1ES. ~

Crust

Oceanie crust Continental crust

Basalt Grani te

5-10 km 20-70 km

Cool, hard, and strong Cool, hard, and strong

Lithosphere

Lithosphere includes the crust and the uppennost portion of the mantle

Varies; the crust and the mantle have different compositions

75-125 km

Cool, hard, and strong

Mantle

Uppermost portion of the mantle included as part of the lithosphere

Asthenosphere

Remainder of upper mantle

Lower mantle

Entire mantle is uitramafic rock. Its mineralogy varies with depth

Extends to 350 km

Extends ffom 350 to 660 km

Extends ffom 660 to 2900 km

Hot, weak, and piastic, 1% or 2% melted Hot, under great pressure, and mechanically strong High pressure forms minerals different from those of the upper mantle

Core

Outer core Inner core

Iron and nickel Iron and nickel

Extends from 2900 to 5150 km

Extends ffom 5150 km to the center of the Earth

Liąuid

Solid