After reading the above Part B and making sure you understand Figure 17.4:Question: 1 Briefly summarize the three ways that material is moved by wind and include the percentage of each mode of transportation.Apply What You Learned: Air reacts in a very similar way to the way a fluid reacts. Compare how material moves along a river to how material moves in wind and identify at two or more similarities. Sand generally begins to move when the wind achieves a velocity of about 4.5 meters persecond (m/sec), which is equivalent to about 10 miles per hour. At first, sand exhibits a rollingmotion called traction or surface creep. Approximately 25% of total sand transport duringsandstorms occurs by traction. As wind speed increases, grains are lifted into the air by windgusts.Once airborne, sand grains travel downwind and then drop back to the surface severalcentimeters from their point of origin. Finer dust particles are lifted from the surface andsuspended in the air at much greater heights than heavier sand grains. With strong winds andturbulence, sand grains can be lifted as high as 2 meters (~6.5 feet) and travel 10 meters (~32feet) or more. About 25% of the total sand transport during these events are caused by thissuspension process.When a settling sand grain impacts the surface, it sends another grain of sand into the air totravel in the downwind direction in a process called saltation. Watching this process in actionmakes sand appear to be bouncing along the surface (Figure 17.4). Saltation accounts for about50% of sand transport over dunes. Once saltation begins, transport can continue undersomewhat lower wind speeds.Wind Direction….Note that after the impact, sediments aredislodged and put into motion.fim.

1. Three Ways of Sand Transportation by Wind Surface Creep or Traction: This type of sand…

Answered: After reading the above Part B and…

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

Related questions

Question

After reading the above Part B and making sure you understand Figure 17.4:

Question: 1

Briefly summarize the three ways that material is moved by wind and include the percentage of each mode of transportation.
Apply What You Learned: Air reacts in a very similar way to the way a fluid reacts. Compare how material moves along a river to how material moves in wind and identify at two or more similarities.