mechanical weathering weathering. chemical weathering three types: abrasion, exfoliation, and ice...
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M E C H A N I C A L W E AT H E R I N G
WEATHERING
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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.
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Abrasion
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Exfoliation
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Ice Wedging
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C H E M I C A L
WEATHERING
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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.
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Oxidation
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Acid Rain
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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).