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Erosion and Landscape Evolution

Erosion and Landscape Evolution - Erosion and Landscape...

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Erosion and Landscape Evolution
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How Do We Know Rivers Cut Their Valleys? John Playfair, 1800 Tributary valleys almost always join the main valley at exactly the same elevation, even though the valleys may begin many miles apart. This is very unlikely unless the rivers have cut the valleys. How Rivers Widen Valleys
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Constructive and Destructive Processes Highlands Erosion Dominates Destructive Processes History not Preserved Little Geological Record Transport Lowlands, Coastal Plain, Lakes and Sea s Deposition Dominates Constructive Processes History Preserved Good Geological Record
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Stream Abrasion, Marathon County
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Stream Potholes, Marathon County
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Mega-Potholes, St. Croix Valley
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Anatomy of a Drainage System
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The Continental Divide, Colorado
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Stream Order
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The River That Did This….
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Looks Like This Near Its Source
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The Ideal Stream Cycle (W.M. Davis, 1880) Not a Literal Time Sequence Youth Maturity Old Age Rejuvenatio n
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Youth V-Shaped Valley Rapids
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