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Weathering, Erosion and Deposition

Weathering, Erosion and Deposition

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Weathering, Erosion and Deposition

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  1. Weathering, Erosion and Deposition BY: BRIANNA SHIELDS

  2. DO NOW How do you test a mineral’s streak? What is a fault? Where do igneous rocks typically form?

  3. Assessment • Compare and contrast fractures and faults

  4. Assessment • Describe the interior layers of the Earth

  5. Assessment • Compare the processes that create fault block mountains and valleys

  6. Assessment • Describe the activities that can occur along faultlines

  7. Assessment • Describe the types of folds that the earth’s crust can undergo

  8. Assessment • Relate the theory of plate tectonics to earthquake and volcano formation

  9. Assessment • Explain how earthquakes occur

  10. Assessment • Explain how volcanoes can occur

  11. Assessment • Compare compression, tension and shearing

  12. Assessment • Describe the differences between domes, plateaus and mountains

  13. Weathering The breaking down of rocks on the Earth’s surface without carrying them away

  14. Mechanical Weathering Rocks are physically broken into smaller pieces No change in minerals Types of Weathering

  15. Chemical Weathering Minerals in the rock change to new ones (chemical reactions) Types of Weathering

  16. Mechanical or Chemical Weathering? • Cracking due to temperature changes

  17. Mechanical or Chemical Weathering? • Frozen water cracks

  18. Mechanical or Chemical Weathering? • Acid rain

  19. Mechanical or Chemical Weathering? • Root pry

  20. Mechanical or Chemical Weathering? • CO2 in rain (pollution)

  21. Mechanical or Chemical Weathering? • Scraping by wind

  22. Mechanical or Chemical Weathering? • Landslides

  23. Mechanical or Chemical Weathering? • Dissolving by water

  24. Mechanical or Chemical Weathering? • Reactions with oxygen

  25. Mechanical or Chemical Weathering? • Plant acids leaking

  26. Erosion Deposition Weathered rock particles are carried away Eroded rock particles are dumped off in a new location Erosion and Deposition

  27. Deposition

  28. Gravity How does it erode? Pulls rocks down slopes How does it deposit? Materials pile up at lower elevations Erosion and Deposition

  29. GRAVITY

  30. Wind How does it erode? Carries rock bits through air- scrapes other rocks FASTER= carries more How does it deposit? Slows and dumps rocks to form dunes/piles Erosion and Deposition

  31. Wind Erosion

  32. Wind Erosion

  33. Running Water How does it erode? Drags rocks Cuts wider and deeper waterways FASTER= carries more How does it deposit? When water slows, rocks are dropped Form deltas/fans or plains Erosion and Deposition

  34. Running Water

  35. Running Water

  36. Glaciers How does it erode? Moving mass of ice Drags rock across other rocks Grinds into land, widens valleys How does it deposit? Rocks dump when glacier melts Makes moraines and drumlins Erosion and Deposition

  37. Glaciers

  38. Glaciers

  39. Glacial Striations

  40. Glacial Drumlins

  41. Glacial Drumlins and Valleys

  42. Waves How does it erode? Crashing waves chip away at rocks Abrasion forms cliffs, arches and caves How does it deposit? Carried particles are dumped on shore Form beaches, sand bars, spits Erosion and Deposition

  43. Wave Erosion

  44. Beach Erosion

  45. Sandbars

  46. Sea Arch

  47. Sea Arches

  48. Sea Cave

  49. Sea Cliff

  50. Sea Cliffs and Stacks