| Title | Comment | Keywords |
|---|---|---|
| Tectonic Clues | 20:52 - 22:15 (01:23) / 1.4 MB | erosion, "tectonic activity", batholith, plutonic, weathering, "Sierra Nevada", California, pluton, intrusion, mountain, andesite, "volcanic arc", ocean, crust, Andes, subduction, "James Sadd" |