Answer the following questions concerned with Figure 1. (15 pts.).

a. What is the feature between 1800 & 2000 on 9 November in Figure 1 called?

b. What morphologic province does the topography shown in Figure 1 typify?

c. Is this topography typical of the Atlantic or Pacific Ocean?

d. Briefly describe the aspects of this topography that lead to your answer in "c." (5 pts.).

Label the continental shelf, shelf break, continental slope, & continental rise (8 pts.).

Answer the following questions concerned with Figs. 1-4 (27 pts.).

a. Was the profile in Fig. 1 collected at low, temperate, or high latitudes?

b. What is the feature between 0445 & 0545 on 10 April in Fig. 1?

c. What does the rough reflector on the left side of Fig. 1 (10 April) represent?

d. Why isn't this reflector visible on the right side of Fig. 1 (11 April)?

e. What is the feature at mile 42 in Fig. 2?

f. Was it ever another feature? If so what?

g. What morphologic province does the topography shown in Fig. 2 typify?

h. What morphologic province does the topography shown in Fig. 3 typify?

i. What morphologic province does the topography shown in Fig. 4 typify?

j. In what ocean(s) are the profiles in Figs. 2 & 3 probably found? Why?

k. In what ocean(s) is the profile in Fig. 4 probably found? Why?

l. Why is the relief apparent in Figs. 2 & 3 different from that in Fig. 4?

m. Why is the shallowest depth in Fig. 3 about 2500 m, & what is the feature adjacent to the shallowest part of Fig. 3 (depth=~3800 m) called (3 pts.)?

Figs. 1-4. (10 pts.)

1. What is the feature between 1400 on 15 April and 0630 on 16 April in Fig. 1?

2. What are the features between 1615 and 1645, 1915 and 1930, and 2015 and 2030 on 15 April in Fig. 1?

3. What is the feature between 2030 on 13 February and 0045 on 14 February in Fig. 2?

4. What is the feature between 0045 and 0600 on 14 February in Fig. 2?

5. What is the feature between 1000 on 14 February and 1915 on 16 February in Fig. 2?

6. What are the irregularities on the slope between 0130 and 0315 on 14 February in Fig. 2?

7. What are the features between 0430 and 1400 on 18 February, 1900 on 18 February and 0230 on 19 February, and 1430 on 19 February and 0245 on 20 February in Fig. 3?

8. What morphologic province does the topography shown in Fig. 4 typify?

9. What ocean(s) is the topography shown in Fig. 4 probably found in? Why?

Draw a bathymetric profile from Savannah to the Hatteras Abyssal Plain, bearing 135 degrees. Use approximately correct depths & distances. Label sea floor features. (15 pts.). [remember - our continental margin is somewhat unusual!]

Briefly discuss the differences between the continental margin provinces in the Atlantic and Pacific Oceans. That is how do the main features of their continental margins differ, and what factors responsible for these differences. Use sketches if you wish. (10 pts.).

Discuss briefly why shelf breaks vary in depth.

Discuss briefly the range of depths that characterize shelf breaks & the reasons shelf breaks vary in depth. (5 pts.).

In the space below, sketch a cross-section across a typical passive continental margin. Use a vertical exaggeration of approximately 100 times. Label all morphological features.

Compare & contrast the ocean basin floor in the Atlantic & Pacific Oceans. Use diagrams if you wish. (10 pts.)

What is the difference between a seamount and a guyot? Why is there a difference? What evidence is there that some of these features were once at sea level? Why did such features submerge to their present depth? Use sketches if you wish.

Ocean Basin Floor (15 pts.). Briefly discuss the differences between the ocean basin floor provinces in the Atlantic and Pacific Oceans - that is how do the main features of their abyssal floors differ, and the factors responsible for these differences. Use sketches if you wish.

Compare and contrast the morphology of the MOR between India and Madgascar with that of the MOR south of Australia. Use sketches if you wish. An age depth curve has been provided in Figure 3 at the end of this test.

Briefly discuss the differences and similarities among rift valleys found at the crests of the Mid-Atlantic Ridge, the Galapagos Ridge, and the southern East Pacific Rise, and the factors that control rift valley morphology. Use sketches if you wish.

Compare and contrast the Mid-Atlantic Ridge and the East Pacific Rise in terms of elevation, width, relief, rift valley characteristics and any other detail that you think important. Use sketches if you wish.