⚙️ how
How do waterfalls erode backward over time?
GeographyWaterfalls
Quick Answer
Waterfalls retreat when the rock below them is worn away faster than the rock above. The overhanging edge eventually collapses, and the waterfall shifts upstream.
The Full Story
Even though waterfalls are often thought of as fixed features, they are usually migrating upstream. Water hitting the base can erode softer rock more quickly than the harder caprock above, creating an undercut ledge. As the unsupported top collapses, the waterfall’s edge moves backward. Over long periods, this process can carve a gorge upstream from the original drop.
Key Facts
1.Harder caprock can protect softer rock below
2.Undercutting causes collapse and upstream retreat
3.Waterfalls can migrate over thousands of years
YouTube Angle
Suggested video title for this topic:
"The secret reason waterfalls travel upstream"