I listened to a joe rogan podcast years ago where this dude Randall Carlson described a mega flood event he called the Younger Dryas caused by a asteroid about 12,000 years ago. He had some really cool photos - which I cannot find searching online at the moment - of places on Earth that look like they’re shaped by an unimaginable amount of water.

One picture was of a mile wide canyon with two symmetrical, perfectly conical holes bored into the rock. Their shape looked just like when you stir liquid in a glass.

There’s floods caused by a whole lotta rain, then there’s floods fueled by rapid melting of glacial ice. The podcast is worth a listen, or at least Google younger dryas.