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But Obsidian Cliff in
northwest Yellowstone is a 200-foot tall
outcrop of pure obsidian
northwest Yellowstone is a 200-foot tall
outcrop of pure obsidian
Full Transcript
00:00:01.000 --> 00:00:03.092
But Obsidian Cliff in
northwest Yellowstone
00:00:05.755 --> 00:00:08.925
is a 200-foot tall
outcrop of pure obsidian.
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Movie Summary
Follows history and wildlife of Yellowstone National Park.