Assignment Task:
On Google Earth, fly to the "Oso landslide memorial" in Washington state. Which of the following statements might help explain why Oso experienced a devastating landslide in 2014 (use your understanding from the video as well as what you can see on the landscape)? Need Assignment Help? Check all that apply. Group of answer choices i) The granite back wall provides evidence of joints that weakened the slope ii) The dense vegetation and river indicate the heavy rainfall that can occur in the region, lubricating slopes iii) Layers of unconsolidated glacial till and other fine particles have relatively low cohesion iv) The relief of the area provides an opportunity for gravity to move material downslope