COASTS and OCEANS (Chapter 20) - Lecture Outline

Last updated: 04/27/07

Basic considerations

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interaction with climate system

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waves and tides are key processes

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ocean basin components

1. Oceans - generalizations

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71% coverage

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exploration tools

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topography of the ocean floor

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key to plate tectonics

2. Anatomy of the ocean floor

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continental shelf

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passive margin

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active margin
 

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continental slope

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continental rise

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abyssal plain

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seamounts

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mid-ocean ridge

3. Turbidity currents

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develops in slope

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rapid

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turbidite sediments - graded beds

4. Deep sea sedimentation

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pelagic sediments

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foram oozes

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siliceous oozes

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carbon compensation depth

5. Edge of the sea

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Coastlines

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coasts

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waves and shore interaction

6. Pattern of wave motion

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circular motion away from shore

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shallow water interactions

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surf zone

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swash-backwash zones

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wave refraction

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erosion

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deposition
 

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longshore drift

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longshore current

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rip current

7. Tides

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Earth-moon system

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two tides per day

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24 hour 50 minute cycle
 

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Earth-sun system

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Spring tides

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Neap tides

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24 hour cycle
 

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Flood tide

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Ebb tide

8. Shorelines

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Erosion

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stacks

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terraces
 

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Deposition

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spits

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barrier islands

9. Hurricanes

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generation of hurricanes

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hurricane intensity

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storm surge