Transcript Weathering and Erosion

Building vs. Weathering
and Erosion of Coastal
Environments
Waves Action
• Constructive vs. Destructive
• Swash (upwash) vs. Backwash
Constructive Zones - Swash Beaches
Larger beach profile.
Marked by dunes and
berms in the backshore.
Swash Beaches - Berms and Dunes
Berms – area where swash ends
Dunes – piles of sand behind berm (transition zone)
Destructive/Constructive - Drift Beaches
Longshore Drift
Movement of sediment along shoreline caused by wave action and
wind.
Destructive Zones
What is weathering?
The physical breakdown
of rocks with no
movement.
What is Erosion?
The action of breaking
down and moving
rock or soil from one
place to another.
Types of Erosion
Hydraulic Erosion
Corrosive Erosion
Abrasive Erosion
Your task:
Coastal erosion is usually what we are worried
about, as humans build and exist in such a
focused way close to the coast line.
Complete the online task about in regards to
coastal erosion.