1. Copyright © 2007 Pearson Prentice Hall, Inc. 1 Geology 4th edition by Chernicoff & Whitney Chapter 19 Shores and Coastal Processes Chapter 19 Shores and Coastal Processes

2. Copyright © 2007 Pearson Prentice Hall, Inc. 2 What Is a Coast? Coast - The entire region bordering a body of water Shoreline - The precise boundary where a body of water meets the adjacent dry land Figure 19-2

3. Copyright © 2007 Pearson Prentice Hall, Inc. 3 Waves Wave anatomy Figure 19-3

4. Copyright © 2007 Pearson Prentice Hall, Inc. 4 Waves Wave movement Figure 19-4

5. Copyright © 2007 Pearson Prentice Hall, Inc. 5 Wave Movement Wave refraction Figure 19-5

6. Copyright © 2007 Pearson Prentice Hall, Inc. 6 Waves & Currents Longshore current Figure 19-6

7. Copyright © 2007 Pearson Prentice Hall, Inc. 7 Waves & Currents Rip current Figure 19-7

8. Copyright © 2007 Pearson Prentice Hall, Inc. 8 Tides How tides work Figure 19-8

9. Copyright © 2007 Pearson Prentice Hall, Inc. 9 Tides Ebb tide Flood tide Figure 19-9

10. Copyright © 2007 Pearson Prentice Hall, Inc. 10 Coastal Erosion Figure 19-11

11. Copyright © 2007 Pearson Prentice Hall, Inc. 11 Coastal Erosion Figure 19-12

12. Copyright © 2007 Pearson Prentice Hall, Inc. 12 Coastal Erosion Headland erosion Figure 19-32

13. Copyright © 2007 Pearson Prentice Hall, Inc. 13 Coastal Erosion Landforms Figure 19-14 Wave-cut bench Wave-cut notch Sea cave Sea arch Sea stack

14. Copyright © 2007 Pearson Prentice Hall, Inc. 14 Coastal Erosion Landforms Figure 19-14 Wave-cut bench Wave-cut notch Sea cave Sea arch Sea stack

15. Copyright © 2007 Pearson Prentice Hall, Inc. 15 Coastal Erosion Landforms Figures 19-14 & 19-23 Wave-cut bench Wave-cut notch Sea cave Sea arch Sea stack

16. Copyright © 2007 Pearson Prentice Hall, Inc. 16 Coastal Erosion Human attempts to prevent coastal erosion Riprap Seawalls Figure 19-15

17. Copyright © 2007 Pearson Prentice Hall, Inc. 17 Coastal Erosion Human attempts to prevent coastal erosion Figure 19-15 Riprap Seawalls

18. Copyright © 2007 Pearson Prentice Hall, Inc. 18 Coastal Transport & Deposition Beaches Figure 19-16 Beach - A dynamic, relatively narrow segment of a coast that is washed by waves and tides

19. Copyright © 2007 Pearson Prentice Hall, Inc. 19 Coastal Transport & Deposition Beach components Figure 19-17

20. Copyright © 2007 Pearson Prentice Hall, Inc. 20 Coastal Transport & Deposition Longshore drift Figure 19-18

21. Copyright © 2007 Pearson Prentice Hall, Inc. 21 Coastal Transport & Deposition Landforms Figure 19-20 Tombolo Spit Hook Baymouth bar

22. Copyright © 2007 Pearson Prentice Hall, Inc. 22 Coastal Transport & Deposition Landforms Figure 19-19 Tombolo Spit Hook Baymouth bar

23. Copyright © 2007 Pearson Prentice Hall, Inc. 23 Coastal Transport & Deposition Landforms Figure 19-19 Tombolo Spit Hook Baymouth bar

24. Copyright © 2007 Pearson Prentice Hall, Inc. 24 Coastal Transport & Deposition Landforms Tombolo Spit Hook Baymouth bar Figure 19-19

25. Copyright © 2007 Pearson Prentice Hall, Inc. 25 Coastal Transport & Deposition Human-induced coastal deposition Breakwaters Groins Jetties Figure 19-21

26. Copyright © 2007 Pearson Prentice Hall, Inc. 26 Coastal Transport & Deposition Human-induced coastal deposition Breakwaters Groins Jetties Figure 19-22

27. Copyright © 2007 Pearson Prentice Hall, Inc. 27 Coastal Transport & Deposition Human-induced coastal deposition Breakwaters Groins Jetties Figure 19-22

28. Copyright © 2007 Pearson Prentice Hall, Inc. 28 Coastal Transport & Deposition Human-induced coastal deposition Figure 19-22 Breakwaters Groins Jetties

29. Copyright © 2007 Pearson Prentice Hall, Inc. 29 Types of Coasts Figure 19-23 Primary coasts - Coasts shaped principally by nonmarine processes Secondary coasts - Coasts shaped by ongoing coastal erosion and deposition Figure 17-10

30. Copyright © 2007 Pearson Prentice Hall, Inc. 30 Types of Coasts Primary coasts Figure 19-24

31. Copyright © 2007 Pearson Prentice Hall, Inc. 31 Types of Coasts Primary coasts Figure 19-24

32. Copyright © 2007 Pearson Prentice Hall, Inc. 32 Types of Coasts Secondary coasts - Barrier islands Figure 19-25

33. Copyright © 2007 Pearson Prentice Hall, Inc. 33 Types of Coasts Secondary coasts - Barrier islands Figure 19-27

34. Copyright © 2007 Pearson Prentice Hall, Inc. 34 Types of Coasts Organic coasts Figure 19-28 Mangrove forest Reef  Fringing reef  Barrier reef  Atoll

35. Copyright © 2007 Pearson Prentice Hall, Inc. 35 Types of Coasts Organic coasts Figure 19-29 Mangrove forest Reef  Fringing reef  Barrier reef  Atoll

36. Copyright © 2007 Pearson Prentice Hall, Inc. 36 Types of Coasts Organic coasts Mangrove forest Reef  Fringing reef  Barrier reef  Atoll Figure 19-29

37. Copyright © 2007 Pearson Prentice Hall, Inc. 37 Types of Coasts Organic coasts Mangrove forest Reef  Fringing reef  Barrier reef  Atoll Figure 19-29

38. Copyright © 2007 Pearson Prentice Hall, Inc. 38 Types of Coasts Organic coasts Mangrove forest Reef  Fringing reef  Barrier reef  Atoll Figure 19-29

39. Copyright © 2007 Pearson Prentice Hall, Inc. 39 Coasts & Plate Tectonics Figure 19-32 U.S. East CoastU.S. West Coast Figure 19-31

40. Copyright © 2007 Pearson Prentice Hall, Inc. 40 Coasts & Sea-Level Change Causes of sea-level change Local change from: Tectonic movement Isostatic movement from:  Ice sheets  Sediment deposition or erosion Land subsidence Figure 19-33

41. Copyright © 2007 Pearson Prentice Hall, Inc. 41 Coasts & Sea-Level Change Causes of sea-level change Global (eustatic) change from change in: Shape of ocean basin Volume of water in the ocean Physical properties of water Figure 1-24

42. Copyright © 2007 Pearson Prentice Hall, Inc. 42 Coasts & Sea-Level Change Causes of sea-level change Figure 19-34