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xkcd #3221: Landscape Features
(imgs.xkcd.com)
xkcd #3221: Landscape Features
Title text:
'Well, there's speculation that it's due to a mantle hotspot.' --a geologist who's trying to cover up the fact that they didn't hear your question
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3221/
The driftless region of MN and WI being shaped by rivers isn't... inaccurate, I suppose. More like "rivers due to nearby glaciers" which isn't quite the same thing.
Many rivers begin with glaciers. The Colorado, Mississippi, and Rio Grande, for example, still receive glacier melt to this day