1. Sedimentary Geology Geos 240 – Chapter 7 Sediment Transport Processes Dr. Tark Hamilton Dr. Tark Hamilton Readings from Sediments & Basins: (7:1-41) Readings from Sediments & Basins: (7:1-41) Camosun College Camosun College

2. Crossbeds, Cretaceous Non-Marine NEBC

3. Hjulstrom Diagram: Caliber vs Velocity

4. Turbulent Boundary Layer Causes Flow Separation: Tractive flow, Entrainment, Suspension

5. Turbidity Current in a Lab Flume: Dense, Turbulent, Sediment Underflow

6. Bedform Phase Diagram: Stable Bedforms vs Caliber & Velocity

9. 2-D Planar Tabular X-beds Platte River Nebraska ~3.19 m/sec

10. 3-D Linguoid Dunes & Trough X-beds

11. Flume Observations Laminar Stable Flow Turbulent Flow

12. Variation in Ripple/Dune shapes Versus Shallowness & Velocity or

13. Large simple X-bed, Devonian Old Red Sandstone. Scotland

14. Real Gap, no bedforms Unstable turbulent transition Gravel Dunes Haro Strait

15. Upper Plane Bed. Platte River Nebraska

16. Upper Plane Bed. Proterozoic siltstone

17. Upper Plane Bed. Ordovician calcarenite. Bed bottom & scour

18. Standing Waves form Antidunes Alaska

19. Standing Waves form Antidunes California Beach

20. Climbing Ripples

23. Planar Cross Beds

25. Trough Cross Beds

27. Gravel Bar Bedforms, Modern River

29. Imbrication of Clasts

30. Reversing Tidal Currents Flood Slackwater Ebb Slackwater * (not all tides are purely diurnal!) ~basin shape

31. Symmetric - Tidal Foresets - Asymmetric Or Tidal Delta

32. New/FullHalf

33. Tidal Bedding Terminology

34. Tidal Ripple Bedforms, Seattle WA

35. Wavy Bedding, Cretaceous, Utah

36. Bedform Type versus Location with Waves

37. Waves in Shallows, Near Shore

38. Wave Rippled Modern Beach South Carolina Interference Patterns in Sandy Ripples Formed During Prior Flood Tide Being Modified in Ebb

39. Wave Rippled Ordovician Calcarenites, Ottawa Sandbars Herringbone Calsiltites Dolo-grainstones

40. Hummocky Cross Stratification (HCS) Jurassic Old Red Sandstone Yorkshire (domes & mounds)

41. Storm Driven – Coriolis Controlled Due to Flow in a Rotating Reference Frame

42. 4 Types of Dunes in Eolian Settings

43. Dreat Sand Dunes Nat’l Monument, CO

44. Transverse Dunes, Gobi Desert, China

46. Barchan Dunes, Gobi Desert, China

47. Modern Wind Ripples Climbing Dune Face Lighter Winds Channelled By Older Dunes

48. Permian Wind Fall Ripples AZ Note Rare Wind Ripple Foresets

49. Modern Grain Fall Deposits Down Dune Face

50. Modern Grain Flow Lobes Down Dune Face

51. Permian Grain Fall & Grain Flow Lenses, UK

52. Flow Direction out of Page & Downwards

53. Foresets & Ripples, Permian, Arizona

54. Wind Ripples Down Dune Face, Permian, Arizona

55. Classification of Sediment Gravity Flows

56. Evolution of Flow Type with Time

57. Debris Flow, Venezuela Feb 2000

58. Cenozoic Debris Flow With Large Logs, Japan

59. Reworked Glaciomarine Debris Flow

60. Miocene Debris Flow, Near Anatolian Fault Turkey

61. Mud Ball?

62. Cenozoic Polymict Conglomerate, California (Any Faults nearby?)

63. Cambro-Ordovician Cow Head Breccia, W. Newfoundland Reef Breccia Abyssal Turbidites

64. Cambro-Ordovician Cow Head Breccia, W. Newfoundland Reef Breccia Remoulded Turbidites

65. Cretaceous Debris Flow Lenses France Tethyan Reef Debris

66. Sediment Gravity Flows & Support

67. See Notes

68. Fluidized Flows, Cretaceous S. France

69. Fluidized Flows, Cenozoic Riverdale CA

70. Dense, Cold, Sediment Laden Glacial Outwash Plunges Beneath Lake Louise AB as a Turbidity Current See Notes

71. 7.2 Quake ~20 km deep Tsunami swept Burin Peninsula

72. 1929 Grand Banks Failure & Tsunami

73. 1929 Grand Banks Failure Triggered by Earthquake (Each Lat° is 60 nm) This Puppy Travelled 1353 km!

74. Complete Bouma Sequence (Medial) Turbidity Event Pelagic Sediment

75. Down Current & Along Transport Evolution of Turbidites Medial Deposits: B >> CDistal D & E CoupletsProximal Deposits: A > B-E