What do people mean when they say “Niagara Falls will erode all the way to Lake Erie”?

Question

I know that eventually the falls will go all the way back to Lake Erie, but all the articles I’ve read say that it will cease to exist, surely that’s not possible? The elevation differential won’t just disappear, right? There will still be a falls so water can get down from Lake Erie into Ontario?

In: 0

Answer 1

Along with the falls, most of Lake Erie will go. After the Niagara River starts eroding deeper at the outlet of Erie, the lake will shrink. At its deepest, Erie is about 30 m *above* the surface level of Lake Ontario.

https://en.wikipedia.org/wiki/Lake_Erie#/media/File:Lake_Erie_and_Lake_Saint_Clair_bathymetry_map.png