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SOLID SURFACES - PHYSICAL CHEMISTRY (a) What topographical features are found on clean surfaces? (b) Describe...

SOLID SURFACES - PHYSICAL CHEMISTRY

(a) What topographical features are found on clean surfaces?

(b) Describe how steps and terraces might be formed.

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Part B.

They are formed by the downcutting of a river or stream channel into and the abandonment and lateral erosion of its former floodplain. The downcutting, abandonment, and lateral erosion of a former floodplain can be the result of either changes in sea level, local or regional tectonic uplift; changes in local or regional climate; changes in the amount of sediment being carried by the river or stream; change in discharge of the river; or a complex mixture of these and other factors

Step-like terraces along valleys form as stream erosion switches back and forth between periods of down cutting versus valley widening floodplain development.

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