| Title | Comment | Keywords |
|---|---|---|
| Mountains Have Thick Crustal Roots | 19:36 - 21:07 (01:31) / 1.7 MB | "Eastern North America", "Appalachian Mountains", collision, erosion, mountain, orogeny, uplift, gravity, "Himalaya Mountains", crust, mantle, "convergent plate", compression, isostasy, "G. B. Airy" |