Yellowstone's Obsidian Cliff: its amazing geologic story
23:36
"Old" Yellowstone in southern Idaho: amazing deposits of pyroclastic flows from explosive eruptions
24:49
Minerals with Willsey: Quartz
15:12
Pokhra Nepal | Vindyanchal Devi Shaktipith | Ganga Aarti Vlog 2024
14:32
Yellowstone Made This Huge Cliff In Nevada?
8:33
The Great Unconformity: a geologic feature spanning 1.3 billion years high in the Wasatch Mtns, Utah
7:05
Metamorphic Rocks--Phyllite Identified
26:07
Big Obsidian Flow
24:16