| Title | Comment | Keywords |
|---|---|---|
| Conclusion | 25:47 - 26:59 (01:12) / 0.8 MB | "James Sadd", "sea floor spreading", "plate tectonics", "global model", "crustal dynamics", "Theory of Plate Tectonics", theory, geology, earthquake, volcanism, mountain, "ocean basin", plate, Earth, mechanism, mantle, geologist |