1 / 28

TODAY

TODAY. Get out your ESRT and a piece of paper The following questions are from your ESRT. You’ll have a minute per question…. Question 1. What are 2 examples of weathering?. Question 2. What is the difference between soil and dirt?. Question 3. What is the P-wave travel time for 4000 km?.

dinesh
Download Presentation

TODAY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. TODAY Get out your ESRT and a piece of paper The following questions are from your ESRT. You’ll have a minute per question…

  2. Question 1 What are 2 examples of weathering?

  3. Question 2 What is the difference between soil and dirt?

  4. Question 3 What is the P-wave travel time for 4000 km?

  5. Question 4 What layer of the earth has a greater temperature than melting point?

  6. Answers • Two examples • Abrasion, Frost action • Soil and Dirt? • Darker, particle size • P-wave travel time for 4000 km? • 00:07:00 • What layer of the earth has a greater temperature than melting point? • Outer Core

  7. Erosion Movement of weathered particles

  8. Vocab • Agents of erosion • Suspension • Saltation • Creep • Angle of repose • Mass wasting

  9. Weathering Breaking down of rocks and other particles into smaller pieces Erosion Transport of the weathered particles. Weathering Vs Erosion TALUS ?

  10. Agents of Erosion • Gravity • Water • Wind • Ice

  11. Water • Water when driven by gravity can be very powerful. • Think of the drainage ditch after it rains – does the water flow fast? Is it clean?

  12. Wind • 3 things to know. • Suspension – Stuff in the air • Saltation – Bouncing • Creep – Rolling on the ground Dust bowl, Causes???

  13. Ice • Glaciers move ice down a slope picking up sediments along the way. • Long Island is simply glacial Poop!

  14. Gravity • Gravity drives all erosion, but one form more important to know is mass movements. • This is when the soil fails and falls or slides down a slope. • Angle Of Repose • Angle where material stays on surface!

  15. Mass movements • Slump • This is when the land slides down equally. • Slide • This is when the land slides down not equally. • Fall- avalanche • The land falls • Flow • The land is liquefied and flows down.

  16. Things that will increase mass movements • Change water content • Change slope • Change mass • Change vegetation • Change human activity

  17. Tully Landslide ‘91 ¼ mile http://pubs.usgs.gov/of/1994/ofr-94-0615/tvstudy.htm

  18. Tully Landslide • April 30, 1993. After a long winter full of rain and snow. The saturated land gave away and began to flow down the hill.

  19. Deposition What is this? What controls this?

  20. Deposition • This is like going to the bank geologically. • Weathering breaks the rocks up • Erosion moves the particles. • Deposition leaves the particles on the ground.

  21. Factors • Particle Size • How big the sediments are. • Shape • Round or flat • Density • Weight and composition • Settling rates • How fast things settle

  22. Sorting Vs Unsorted • ESRT page • How to find sediment size. • How to find Speed.

  23. Ways to deposit • Glaciers • Sorted or Unsorted • Streams (Water) • Sorted or Unsorted • Wind • Sorted or Unsorted • Mass movements (gravity) • Sorted or Unsorted

  24. Gravity • Gravity alone does not sort sediment • Landslides are the main form of gravity deposition. • Why are sediments unsorted?

  25. Glaciers • Glaciers leave sediment unsorted. • Like gravity Land slides • What moves the glacier?

  26. Water • Streams, Rivers deposit sediment in sorted layers. • Why are sediments sorted?

  27. Wind • Wind like water sorts sediments. • Why are sediments sorted?

  28. Wind • Wind like water sorts sediments. • Why are sediments sorted?

More Related