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