M E C H A N I C A L W E AT H E R I N G

WEATHERING

CHEMICAL WEATHERING

• Three types: Abrasion, Exfoliation, and Ice Wedging.• Abrasion- constant collisions• Exfoliation- plants, trees, roots, growing through

due to extreme pressure.• Ice wedging- Water thawing and freezing over

time. Frozen water expands creating breaks in rocks.

Abrasion

Exfoliation

Ice Wedging

C H E M I C A L

WEATHERING

CHEMICAL REACTIONS

• There are two types of chemical weathering: Oxidation and Acid Rain.• Oxidation- air and water reacting to metal in

rocks usually results in a change of color.• Acid Rain- chemical rain that results in rock decay

such as holes or pieces missing.

Oxidation

Acid Rain

WEATHERING, EROSION, DEPOSITION

•Weathering: The Breaking down of rocks• Erosion: The carrying away of rocks. Caused by water and wind.•Deposition: The final resting place of rocks. (think of a deposit at the bank, it stays there…usually).