“Shoreline Processes”

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Presentation transcript:

“Shoreline Processes”

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

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

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

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

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

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