- Social Studies
- Visual Art
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North Dakota and Minnesota Regional Studies collection offers resources on the people, places, events, and fascinating history of North Dakota and Minnesota for teachers, students, and lifelong learners.
Erling Rolfsrud talks about the impact of glaciers on the Red River Valley, how they formed hills and “kettle lakes” and left boulders in their path.
Erling Rolfsrud explains why the Red River is so winding and how river currents affect the path it takes northward. His explanation includes information about why the Red River Valley is so flat and prone to flooding, and why the tributaries to the Red River start off flowing southward, but turn north before heading into the Red River.
Erling Rolfsrud explains how the glaciers affected the geography of the Red River Valley. The film also covers the history of mammoth Lake Agassiz, including how it originally formed and historic water levels that have affected the way the Red River Valley looks today.
Erling Rolfsrud examines how glaciers have influenced the geography of the Red River Valley, including information about the mammoth glacial lake, Lake Agassiz, and how it receded to form the Red River. Find out why the land is flat and where the huge rocks on the prairie came from.