1. Erosion Junhel C. Dalanon, DMD, MAT SNSCLC – Minglanilla Minglanilla, Cebu, Philippines 6046

3. wave length wave height crest trough particles in waves follow a circular pattern COASTAL LANDFORMS

7. Wave refraction Bay Headland

16. This side is pulled towards the Sun and/or Moon by gravitational attraction This side bulges out because of inertia Therefore, there are two high tides on Earth at any one time

17. Every 24 hours 50 minutes any point on the Earth rotates through two bulges Each location experiences 2 high (FLOOD) tides and 2 low (EBB) tides

18. Types of Coastline Submergence and emergence changes coastlines Pocket beaches

26. AEOLIAN (Eolian) LANDSCAPES Wind erosion, transport and deposition Occurs in dry regions, with little vegetation such as deserts and coastal landscapes

28. DEFLATION HOLLOWS Removal of fine particles by wind leaves hollows behind (DEFLATION HOLLOWS) Also leaves a surface of closely packed stones (DESERT PAVEMENT)

29. WIND TRANSPORTATION - Very fine material may be carried in suspension in the air - But larger particles may be moved by 2 methods: SURFACE CREEP & SALTATION

30. 1.) SURFACE CREEP - material is rolled along the surface - accounts for 20% of wind transport

31. 2.) SALTATION - The asymmetrical bouncing of sand grains - Accounts for 80% of wind transport - Cause of shifting sand dunes

32. Aggradational land forms SAND SEAS (ERGS) = only 25% of the world's deserts surface may be covered in RIPPLES

33. SAND DUNES are ridges of wind deposited sand - Usually 3 to 15 metres high, but can reach 180 metres - A continuously changing dune is ACTIVE Corbis Digital Stock

34. The formation of dunes depends on: - amount of sand - speed and direction of wind - occurrence of vegetation Corbis Digital Stock

35. wind direction BACKSLOPE SLIPFACE movement of sand angle of repose crest

36. TYPES OF SAND DUNE 1.) BARCHAN - most common type - crescent-shaped Wind direction backslope slip face

37. 2.) PARABOLIC DUNES - crescent-shaped but with the concave side on the windward side - usually elongated - may develop in associated with deflation hollows Wind direction