Researchers Reveal Ancient Hotspot Shaped Formation of Great Lakes
New evidence suggests that the Great Lakes owe their extraordinary size and depth not just to Ice Age glacial activity but also to ancient geological processes. A study published in Geophysical Research Letters highlights the role of a geographic hotspot that interacted with the Earth's lithosphere millions of years ago, reshaping our understanding of these iconic water bodies' origins.
As the ancient supercontinent Pangea drifted over the hotspot, the Earth's lithosphere thinned. This thinning made the region's crust more fragile and susceptible to deformation, paving the way for significant geological transformations over time.
Seismic Wave Analysis Confirms Deformation
Seismic wave data provided key evidence for the hotspot's role. Unusual horizontal wave movements beneath ...








