NAME____________________Answer sheet for Mass Wasting exercise.
1. For the Judgment Cliff landslide, outline and label on the topographic map:
a. The scarp surface.
b. The slide deposit.
c. The intervening depression.
2. Construct a topographic profile along the segment A-A'. Label the different parts of the profile (i.e., scarp, slide deposit, depression).
3. Combining the information in the small profile (beneath the geologic map) and in your topographic profile reconstruct the original profile of Mt. Sinai (prior to the 1692 earthquake). I.e., sketch onto the profile the original position of the transported material.4. Examine the topographic map, and find another major landslide. (Hint: The slide can be found along grid line 385000N.)
a. What is the evidence for the slide?b. Outline and label, on the map, relevant features of the slide (i.e., the slide deposit, the scarp, the depression). The edges of the slide deposit show up particularly well by connecting points of inflection in the contour lines.
c. Give the grid coordinates for the highest point on the slide deposit.d. Construct an E-W topographic profile across the landslide.
e. In the profile, try to project the original land surface beneath the slide deposit, i.e., on the profile, with a dashed line, show approximately the bottom surface of the slide deposit.
5. Compare the profiles for the two landslides. Factors you should discuss include (1) the steepness of the scarp, (2) the difference in the elevation between the top of the deposit and the bottom of the depression, and (3) the thickness of the deposit. Offer an explanation for any obvious differences. (Hints: Think in terms of the strength of the material. The Judgement Cliff landslide involves mostly limestone. The second landslide involves mostly shale. What do you know about the strengths of these rock types?)