1. Coasts Coastal classification based on tectonic activity
Active coast- close to tectonic plate boundary
Passive coast- far from tectonic plate boundary

2. Shepard Coastal classification system
Primary coast- formed by processes not directly related to the ocean
River erosion or deposition
Erosion from glaciers
Tectonic activity
Volcanic activity

3. Shepard Coastal Classification system
Secondary coasts- formed directly by marine action
Wave erosion
Marine deposition
Marine organisms (reefs and
mangrove forests)

4. Combination coasts= combo of both primary and secondary

5. Coastal dynamics
Longshore Drift- tendency for material to move along the coastline due to longshore current

6. Coastal dynamics Sections of a Beach
Dune- hill of sand toward back of beach
Backshore- region rarely touched by sea water
Foreshore- part that water sometimes covers
Offshore- extends below low tide mark

7. Coastal dynamics
Coastal cell- coastal region that changes in shape but there is no net loss or gain in sand
Erosion- loss of sand
Accretion- gain in sand

8. Coastal dynamics Large scale sand features
Spit- length of accumulated sand attached to land at one end, pointing in the direction of the longshore drift

9. Coastal dynamics Large scale sand features
Tombolo- spit that extends between two islands

10. Coastal dynamics Large-scale sand features
Barrier island- large sediment deposits that form between the ocean and the shoreline