To your point, I live in Northeast PA. There’s a state park Hickory Run that in the middle of the

woods has what’s known as Boulder Field (you can google it and see the pictures) It’s about two football fields long with nothing but boulders. This was a result of when the glacier receded 10k years ago and left these boulders. So if the glacier came down this far years ago, why did it recede? Because the earth warmed. A convenient fact that liberals seem to ignore.