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External Changes

External Changes . Weathering-- Breakdown of Rock Erosion-- the movement of weathered materials. The term originates from the Latin term rodere-- “To gnaw away”. N3659.764 W11200.365. Weathering. Mechanical--breaking rock (material) into smaller pieces.

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External Changes

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  1. External Changes • Weathering--Breakdown of Rock • Erosion--the movement of weathered materials. The term originates from the • Latin term rodere-- “To gnaw away”

  2. N3659.764 W11200.365

  3. Weathering • Mechanical--breaking rock (material) into smaller pieces. • Chemical--changing the chemical makeup. The key for chemical weathering is moisture. Several common minerals dissolve in water. • Oxygen combines with iron-bearing silicate minerals causing "rusting"

  4. Frost Wedging

  5. Erosion • Water -- Rivers, Waves • Wind--Anyplace • Glacial--Mountains--U-shaped valleys Sheet Glaciers--Antarctica

  6. An Example of Water Erosion Nile River DELTA

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