With Niagara falls going as hard as it has for as long as it has, where does all of that water come from?
Edit: My first gold! Thank you kind stranger. Also, thank you for all of the kind and informative responses to such a silly question. Definitely helped a lot!
In: Geology
The key is that rain from a huge area all goes over those falls. Check out this image: [https://upload.wikimedia.org/wikipedia/commons/d/d4/Sub-basins_Great_Lakes_Basin.png](https://upload.wikimedia.org/wikipedia/commons/d/d4/Sub-basins_Great_Lakes_Basin.png)
This is the great lakes watershed. That means all of the land where rain will flow into a river that will flow into one of the great lakes. Then, the water in each lake flows into the next lake from west to east. Niagra falls is between Lake Eire (yellow) and Lake Ontario (red). That means *all rain* that falls in the pink, blue, green, and yellow areas accumulates and goes over the falls.
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