Best writers. Best papers. Let professionals take care of your academic papers

Order a similar paper and get 15% discount on your first order with us
Use the following coupon "FIRST15"
ORDER NOW

Question For the remaining questions, refer to the case study for additional information. What term best describes the type of mass movement that occurred along US Highway 89 on February 20th, 2013? Slide Creep Subsidence Fall Flow 2 points QUESTION 7 How wide is the scarp of the mass movement at the top? In other words, what is the length of the damaged section of the highway? 50 feet 150 feet 1000 feet 1/4 mile 1 mile 2 points QUESTION 8 Use the figure on slide 7 of the landslide lecture from this lab to answer this question. Based on your classification of this mass movement in the first question, what would you expect the water content and speed to be for this mass movement? moist & slow to rapid saturated & rapid moist & extremely rapid dry & extremely rapid dry & extremely slow 2 points QUESTION 9 How high is the scarp, on average, where it buckles the roadway? (estimate from the photos you have seen) 50 feet 20-25 feet 2 feet 100 feet 4-6 feet 2 points QUESTION 10 What phrase best describes the weather in the preceding weeks before the mass movement occurred on February 20th? Abnormally cold and snowy Abnormally cold and dry Cloudy and very wet Sunny and Dry Abnormally hot with frequent thunderstorms 2 points QUESTION 11 What is the likely cause of this mass movement? Freeze/thaw action related to freezing temperatures and snow widened existing cracks and reduced slope stability. Heavy rains occurred immediately before the slide, reducing the cohesion of the slope. Ongoing construction along the highway disturbed the stability of the slope. It was triggered by an earthquake A fracture in a weak shale layer deep within the bedrock beneath the highway 2 points QUESTION 12 What is a unique aspect of this mass movement that makes it quite different from other mass movements that we have discussed in this course? It was a very wet slide despite there not being significant precipitation preceding the slide. It was a deep bedrock slide and the slide had no toe The toe/runout of the slide was much longer than expected. It was very shallow, only affecting the roadway and not disturbing the bedrock beneath it at all. There was no history of mass movements in the area before this event occurred 2 points QUESTION 13 There is a long historical record of landslides occuring along the Echo Cliffs in this region of Arizona. True False 2 points QUESTION 14 See the ‘A Historical Review’ link on the AGU Landslide Blog Post on this event (link in the lecture slides) to best answer the remaining questions. What is the name given to the geologic formation (geologists give names to groups of rocks of similar age and type. These groups are called formations) that is the likely source of the weak bedrock layer that makes landslides common in this region? Moenkopi Formation Navajo Sandstone Windgate Sandstone Shinarump Conglomerate Chinle Shales 2 points QUESTION 15 This USGS report concludes that there is one controlling factor that is more important than any others for causing landslides in this region. What is that factor? The inherent instability of the Shinarump conglomerate Rejuvenation of Colorado River erosion The frequency of earthquakes along the cliffs Distribution of ground water Presence of highways along the cliffs

/in /by

Question

For the remaining questions, refer to the case study for additional information. What term

best describes the type of mass movement that occurred along US Highway 89 on February 20th, 2013?

Slide
Creep
Subsidence
Fall
Flow

2 points   QUESTION 7

  1. How wide is the scarp of the mass movement at the top?  In other words, what is the length of the damaged section of the highway?50 feet150 feet1000 feet1/4 mile1 mile

2 points   QUESTION 8

  1. Use the figure on slide 7 of the landslide lecture from this lab to answer this question.  Based on your classification of this mass movement in the first question, what would you expect the water content and speed to be for this mass movement?moist & slow to rapidsaturated & rapidmoist & extremely rapiddry & extremely rapiddry & extremely slow

2 points   QUESTION 9

  1. How high is the scarp, on average, where it buckles the roadway? (estimate from the photos you have seen)50 feet20-25 feet2 feet100 feet4-6 feet

2 points   QUESTION 10

  1. What phrase best describes the weather in the preceding weeks before the mass movement occurred on February 20th?Abnormally cold and snowyAbnormally cold and dryCloudy and very wetSunny and DryAbnormally hot with frequent thunderstorms

2 points   QUESTION 11

  1. What is the likely cause of this mass movement? Freeze/thaw action related to freezing temperatures and snow widened existing cracks and reduced slope stability.Heavy rains occurred immediately before the slide, reducing the cohesion of the slope.Ongoing construction along the highway disturbed the stability of the slope.It was triggered by an earthquakeA fracture in a weak shale layer deep within the bedrock beneath the highway

2 points   QUESTION 12

  1.  What is a unique aspect of this mass movement that makes it quite different from other mass movements that we have discussed in this course? It was a very wet slide despite there not being significant precipitation preceding the slide. It was a deep bedrock slide and the slide had no toeThe toe/runout of the slide was much longer than expected. It was very shallow, only affecting the roadway and not disturbing the bedrock beneath it at all.There was no history of mass movements in the area before this event occurred

2 points   QUESTION 13

  1. There is a long historical record of landslides occuring along the Echo Cliffs in this region of Arizona. True False

2 points   QUESTION 14

  1. See the ‘A Historical Review’ link on the AGU Landslide Blog Post on this event (link in the lecture slides) to best answer the remaining questions.
      What is the name given to the geologic formation (geologists give names to groups of rocks of similar age and type.  These groups are called formations) that is the likely source of the weak bedrock layer that makes landslides common in this region?Moenkopi FormationNavajo SandstoneWindgate SandstoneShinarump ConglomerateChinle Shales

2 points   QUESTION 15

  1.  This USGS report concludes that there is one controlling factor that is more important than any others for causing landslides in this region.  What is that factor?The inherent instability of the Shinarump conglomerateRejuvenation of Colorado River erosionThe frequency of earthquakes along the cliffsDistribution of ground water Presence of highways along the cliffs
 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"