| Title | Comment | Keywords |
|---|---|---|
| Relative Age Dating of Rocks | 11:23 - 12:24 (01:01) / 1.2 MB | "relative age dating", "Principles of Relative Age Dating", "James Sadd", correlation, "Kiabab Limestone", "Grand Canyon", "rock formation", Arizona, Minnesota, "Mount Saint Helens", "sedimentary rock" |
| Mississippi River | 16:28 - 17:56 (01:28) / 1.5 MB | river, humans, equilibrium, "Mississippi River", "United States", erosion, deposition, sediment, Minnesota, "Gulf of Mexico", bar, commerce, "New Orleans", "Baton Rouge", "North American Continent", "U.S. Army Corps of Engineers", "Red Eye Crossing", "river channel" |