infuence of geology Flashcards
what are coastal landscapes are affected by
geology , erosion and landform creation
what is
What are the primary factors determining the shape and features of a coastline?
Geological structure, rock type, and wave action play key roles in shaping coasts.
Describe the process of longshore drift and its effect on coastal sediment.
Longshore drift (LSD) transports sediment along the beach at a right angle.
Compare and contrast the erosion rates of soft and hard rocks in coastal environments.
Soft rocks (e.g., clay) erode faster than hard rocks (e.g., granite).
How do the characteristics of soft and hard rock cliffs differ?
Soft rock cliffs are high, steep, and rugged; hard rock cliffs are less rugged and less steep.
What types of landforms are typically associated with hard rock and soft rock coastlines?
Hard rock coastlines feature wave-cut platforms and headlands, while soft rock landscapes have arches and stacks.
Define and differentiate between concordant and discordant coastlines.
Concordant coasts consist of the same soft rock type, whereas discordant coasts have alternating rock types, forming headlands and bays.
Explain how joints and faults affect the erosional processes along a coastline.
Joints (smaller cracks) and faults (larger cracks) make rocks more prone to erosion.
Describe the characteristics of destructive waves and their impact on coastal erosion.
Destructive waves have a weak swash but strong backwash, eroding the coast during stormy conditions.
How do constructive waves contribute to coastal landform development?
Constructive waves have a strong swash and weak backwash, depositing materials during calm conditions.
Give two examples of landforms commonly found along discordant coastlines.
Examples of landforms along discordant coasts include headlands and bays.
