Themes of the Day:

• Shorelines and Coastal Processes
• Impacts, Natural Hazards Wrap-up

Shorelines and Coastal Processes

• Waves (wind) and Tides (lunar gravitation)
• Wave basics - wavelength, motion, wave base
• Waves approaching a shoreline
• Oblique Wave Approach
• Wave Refraction
  • Development of headlands and coves
  • tombolos and seastacks
• Shoreline features and sand migration processes
  • Breaking waves
  • Shore Profile
  • Rip Currents
  • Longshore Drift
    • sand particle motion - net migration
    • longshore bars
    • spits
    • baymouth bars
    • Effects of Jetties and Groins - basic example - other examples
• Seacliff/coastal erosional processes
  • wave-cut platform (terrace)
  • Seacliff erosion by mass wasting
  • D'oh!
  • D'oh!
  • Combatting Erosion
• Sand Budget: Sediment Input and Output from shorelines
• Barrier Islands - Outer Banks
• Hurricanes - tracks, frequency

Discussion: Barrier Islands and Shoreline Erosion issues

Impacts, Natural Hazards Wrap-up

• Meteorites and Related Objects
• Earth in the Solar System
• Incoming!
• Barringer Meteor Crater cross section
• Impact Sequence - simple crater
• Impact Sequence - complex crater
• Cheaspeake Bay Impact Location
• Cheaspeake Bay Impact Cross Section
• Manicougan Impact, Quebec
• Shoemaker-Levy 9G Impact on Jupiter
• Walter Alvarez at the K-T Boundary in Gubbio, Italy
• Chicxulub Crater, Yucatan Peninsula, Mexico
• Chicxulub Sequence of Events
• Impact Energy vs. Recurrence Interval