The global warming that ended the last ice age led to a lot of flooding. There weren't too many places that escaped some impact from it.
I took basic geology courses at Idaho State and they included a field trip to the Portneuf Gap. The Lake Bonneville deluge down the Snake really must have been something to behold!
I live on a 1600 foot Appalachian mountain and I can’t take a step without tripping over a rock with a scallop [or other sea critter] fossil in it.
We’ve also got more glacial boulders than we know what to do with.
It cracks me up that people think the earth is some static, fragile thing.