1. Coastal Processes WHAT am I?

2. Wave Action
1) I add sand to a beach
2)I take sand away from a beach.

3. 3) I am point of land that extends outwards into a body of water from a coastline; often having a steep cliff face
4) I am the Bending action of waves

4. 5) I am also known as corrasion, occurs as waves hurl bits of rock and sand against cliffs and headlands.
6) I enters a crack in the rock and push the air deeper

5. I couldn’t find a better image!
7) I am a type of erosion where rock fragments break away from the rock surfaces hit against each other and erode into smaller fragments.

6. 8) I am a type of erosion where soluble minerals dissolved by water
8) I am a type of erosion where soluble minerals dissolved by water. (limestone headlands)

7. Erosional Features
9) I am the first stage of wave erosion and I’m a point jotting out on the landscape. I am a result of wave refraction. You saw me earlier in this powerpoint

9. 10) I am the second stage of wave erosion and I am the initial opening in a headland.

10. 11) When two caves meet I a born.

11. 12) When a sea tunnel is further eroded I am created.

12. 13) When a sea arch drops due to the force of gravity I stand alone

13.                                 .
14. As the steep cliff retreats landwards, a flat terrace at the foot of the cliff is exposed due to erosion at base.

15. DEPOSITIONAL FEATURES

16. 15) I am the zig-zag motion of sand up along a coastline due to current and wind

17. 16) We are the structures built perpendicular to the coastline to try to keep sand in place.
Courtesy: P. Mleziva

18. 17) In addition, To prevent erosion of the coastline or to shelter boats humans build us.

19. 18) I am the extensive deposit of sand and/or gravel in the form of a beach at the back of a bay.

21. 19) I am long and narrow accumulation of sand and/or gravel that projects into a body of ocean water. These features form as the result of the deposition of sediments by longshore drift.

22. 20) I am a narrow deposit of sand and/or gravel found across the mouth of a bay.

23. 21) I am a long, narrow islands of sand and/or gravel that are usually aligned parallel to the shore of some coasts

24. 22) I am Mr. K’s favourite coastal feature that forms when a belt sand and/or gravel is deposited between an island and the mainland. This feature is above sea-level for most of the time. (THIS IS A DEPOSITIONAL NOT EROSIONAL FEATURE)
                                                                                
                                                                                

25. 23) I am the coastal water body separating a barrier island or offshore bar from the mainland or the water trapped behind a baymouth sand bar.

26. Depositional Landforms
Common Depositional Landforms
Hooked Spit due
to northward current and flow into bay
Longshore Processes and Depositional Coastlines

27. Classifications of Coastlines
24) Do you remember me from the Glacier Unit? I am U shaped valleys leading down to the sea that have been drowned as a result of a rise in sea level. British Columbia has this type of coastline.

28. 25) We are V-Shaped valleys created by Rivers and leading to the sea that have been drowned as a result of a rise in sea level.

29. Coral Reefs
Coral reefs occur in warm tropical waters where soft-bodied creatures, known as corals, produce a skeleton of calcium carbonate; when these creatures die, their skeletons form a foundation upon which new corals can grow resulting in the continual growth of the coral reef.
An atoll is a Pacific circular reef enclosing a lagoon.
More about reefs:

30. Development of Atoll

31. Emerged versus Submerged Shorelines
15) Emerged Shorelines: the land has risen; the water has become shallower.
Significance to Humans
Pros: newly emerged coastal plain potentially offers an area of land for agricultural settlement; beaches and / or lagoons develop into resort areas.
Cons: difficult for commercial shipping because of offshore bars and few deep water ports
16) Submerged Shorelines: land has sunk and / or the water has risen.
Pros: Irregular coastlines offer sheltered, deepwater harbours which are excellent for ports
Cons: Irregular coastlines hinder land transportation along the coast and rough terrain hinders human settlement
Which one of the following features would not be associated with a submerged coastline?
a) rias b) fiords c) spit d) offshore bar e) baymouth bar