August 2, 2020 Author: Phyllis RootPhotographer: Kelly Povo Morton Outcrops Scientific and Natural Area is a gift from the glaciers.  When glacial River Warren emptied out glacial Lake Agassiz 10,000 years ago, the vast torrent exposed some of the oldest known bedrock in Minnesota–3.6 billion years old. On a perfect August day we drove out to … Continue reading Prairie on the Rocks