Physical Geology Helpful Lab Hints
Guide to the photos and maps of Exercise 12.
Remember: The term "landform" refers to the geologic name given to a specific type of feature. Refer to lab book and textbook for the terms to use (especially the figures and photos).
Problem 1.b. What happens to a stream channel as it leaves the mountains? What does it do? What feature is created? Hypothesis: Why does this happen? Test: How could you check your hypothesis? What kind of evidence or observation might support it?
Problem 1.c. Of the light, gray, and dark areas, which are old, middle-aged, or young? What will an area look like if it is freshly eroded or newly deposited?
Problem 2.a. If there is an active fault on one side of the valley, will fans on that side be large or small? Will the mountain front be straight or jagged?
Problem 2.c. Gradient = difference in elevation/miles between the two points. The break in the map deletes some of the contour lines so...the low point is at elevation -242 ft. and high point is on the 800 ft. contour line.
Problem 3.c. What landform feature are those isolated hills? How does that landform form? (hint: see figure 12.4)
Problem 3.d. Base level is discussed in the textbook in the chapter on rivers (Chapter 17, page 536).
Problems 5.a. & b. See figure 12.8, p. 218.