Page 216 - NS-2 Textbook

OCEANOGRAPHY 211

5. What are the three distinct divisions or areas of the B. What is the engineering problem that must be
ocean floor? solved regarding the "mining" of these nodules?
6. Under international law, to what water depth does 15. A. What is the purpose of a coring tube?
a maritime nation have the right to explore and ex- B. How does it work?
ploit?
7. What is the continental slope?
8. Why are the continental shelves the most valuable Vocabulary
part of the ocean floor today?
sediment submarine fan
9. What is a submarine fan, and how does it develop?
ooze echo sounder
10. What are the major segments of the Mid-Ocean
Ridge? ocean ridge topography
atoll relief map
11. Describe the geologic sequence of events in the
seamount contour line
"wearing down" process of an oceanic island.
lagoon continental shelf
12. What is the difference between a seamount and a
guyot? guyot continental slope
13. A. What are the three general types of sediments volcanic eruption terrace
found on the ocean floor? glaciation nodules (metallic)
B. Why do sediment thicknesses vary widely from turbidity current coring tube
one part of the ocean floor to another? submarine canyon detritus
14. A. How do metallic nodules form on the ocean floor? rift abyss