Erosion: A Story of a Wabasha Valley
Once upon a time, there was no valley, no ravine, no house, and no driveway. Between 30,000 and 15,000 years ago, glaciers reached their maximum extent covering much of North America. As the glaciers melted, they formed a massive lake around 13,000 years ago called Lake Agassiz. Over roughly the next three thousand years this […]
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