Lake Superior and the Midcontinent Rift: the billion year story
45:59
The Mysteries Of North America's Great Lakes | Naked Science | Spark
44:18
Ghost Ships of the Great Lakes: Lost Beneath the Waves (Full Episode) | National Geographic
1:04:01
Great Earthquakes of the Pacific Northwest
38:43
Investigate mysterious features with a geologist
12:21
At This Spot, North America Almost Split in Two | The Midcontinent Rift
32:40
The Earliest We've Ever Hunted Rocks on Lake Superior
28:10
Old Copper Culture: North America's Forgotten Metal Workers
18:44