This chapter has only one part on the computer: Exercise 4E - Locating the
unknown rock samples, done on two images.
Unknown Rock Samples 1 - 5.
The view is toward the northwest, and you are not seeing all the map.
Unknown Rock Samples 6 - 8. This view is
toward the west from the east edge of the map area, and you are not
seeing all the map. It
shows the south-facing cliffs in the east-central part of the map
(1,000 meters north of the south edge of the map).