1. Warm-up Week 4
The vertical distance between trough and crest is called the ____.
a. wave height c. fetch
b. wavelength d. wave period
A fetch is _________.
a. a method of shoreline erosion
b. a type of wave-cut platform
c. the distance that wind travels across open water
d. the circular pattern made by water particles when a wave passes
A ____________ tidal pattern has two high tides and two low tides each day.
a. semidiurnal c. diurnal
b. bidiurnal d. mixed

2. “Shoreline Processes”

3. What is a “Beach” anyways?!
Accumulation of sediment near water

4. Do Beaches Change? Forces change beaches!
Push/Pull or waves & currents
This creates shoreline features.

6. Forces that change Beaches.
Abrasion
Grinding of moving sediments
“Sand-papering”
Refraction
Bending of waves
Where sediment is deposited
Longshore Transport
Sideways shore currents
Erosion = movement

7. 2 Types of Shoreline Features
Erosional Features
Created by moving sediment away
Depositional Features
Created by leaving a pile of sediment

8. Erosional Features. Wave-Cut Cliff Platform Sea Arch Sea Stack
Flat cliff along water
Platform
Benchlike surface along cliff
Sea Arch
2 caves join
Sea Stack
Arch falls down

9. Depositional Features.
Spit
Long “finger” of sand
Hook at end (usually)
Bar
Shallow area
Sand peaks out of water
Tombolo
Connects island to mainland