Walls of ice churn up the landscape leaving in their wake gravel, sand, silt and clay; filling in the valleys, grinding down the ridges and accumulating in piles. A steady flow of Canadian granite emigrating to what is now the Unites States. Massive lakes form behind these piles of rock and sand. Eventually their contents breach, leaving behind vast flats, wide river valleys and sand counties. These boulders, rocks, sand and clay are known a glacial drift.
There are pockets of the great white north that were spared from the most recent wall of ice. In these places the valleys and ridges remain. And roads, glorious roads! It's know by geologists as the driftless.
One of the best documentaries about the coulees and ridges we ride through was put together by Untamed Science, an "extremely passionate group of scientists, teachers and film makers." Mysteries of the Driftless is a 25 minute film that highlights some of the most unique aspects of this area.
Another short worth watching, put together by fellow blogger over at The Winona Fly Factory.
|Respect must be paid. |
(queue the Reservoir Dogs soundtrack)
- Ride North