Wave Formation and Coastal Processes
The first page introduces fundamental concepts of coastal geography and wave mechanics, with detailed explanations of wave formation and erosion processes.
Definition: Wind fetch is the distance over which wind blows across water to create waves. The longer the fetch, the larger the resulting waves become.
Vocabulary: Hydraulic action refers to the force of waves against rocks and cliffs, where compressed air in cracks breaks off rock fragments.
Example: The formation of headlands and bays demonstrates differential erosion, where harder rocks resist erosion while softer rocks erode more quickly.
Key erosion processes covered include:
- Hydraulic action: Wave force breaking rocks
- Attrition: Rocks colliding and becoming smoother
- Abrasion: Wave-carried debris eroding coastline
- Solution: Chemical dissolution of rock
Highlight: The document emphasizes how coastal processes work together to create distinctive landforms like caves, arches, and stacks through progressive erosion stages.
Quote: "Headlands form due to differential erosion. Waves form cracks in the rock due to erosion."
The page also covers mass movement and weathering processes:
- Biological weathering from plants and animals
- Chemical weathering changing mineral composition
- Mechanical weathering through physical forces