The Randall Carlson
@therandallcarlson·632K subscribers·2.1K videos
300 to 400 Million Cubic Feet Per Second
Posted
February 21, 2026
Views
213,282
Likes
4,205
Comments
174
Engagement
2.05%
February 21, 2026
213,282
4,205
174
2.05%
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1:02Now PlayingA terminal moraine traces the exact edge of a glacier lobe that once reached back over the Canadian Rockies. Next to it lies the Grand Coulee. A canyon carved by meltwater pulses that peaked at 300 to 400 million cubic feet per second between 12,000 and 14,000 years ago. Water at that volume doesn't erode gradually, it excavates entire landscapes.
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