⚙️ how
How do waterfalls retreat upstream over time?
Quick Answer
Waterfalls retreat upstream when erosion undercuts the rock at their base and pieces collapse. The waterfall then shifts a little farther back toward the source.
The Full Story
A waterfall is not usually fixed in place. Falling water erodes the rock at the base, often creating a plunge pool and undercutting the cliff. When the overhanging rock becomes unstable, it collapses and the waterfall moves slightly upstream. Over thousands of years, this process can carve long gorges behind the falls.
Key Facts
1.Base erosion causes collapse
2.Waterfalls can migrate upstream
3.Can create gorges
YouTube Angle
Suggested video title for this topic:
"Why waterfalls slowly walk backward through rock"
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