There lies a hidden canyon deeper than the Grand Canyon just offshore of Alaska. There, the Zhemchug Canyon is submerged underwater, but encompasses a vast ravine which is up to 8,530 feet deeper than the adjacent sea floor. This is the story of how this magnificent canyon formed in the Bering Sea, and how its formation relates to the Yukon River.

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Sources/Citations:
[1] U.S. Geological Survey
[2] NOAA

0:00 Deeper than the Grand Canyon
0:30 Zhemchug Canyon
1:18 Ice Age
1:54 Lower Sea Levels
2:47 Turbidity Currents