Uploaded May 2026 | Updated September 2026, 8 hours ago
If a river cuts straight through a mountain, does that mean the river is older and the mountain rose underneath it? This question is often asked about the Susquehanna River, among other Appalachian Rivers. The answer is complicated, and this video lays it out. Rivers are more dynamic than we think, and, over time, they can do all sorts of crazy things. This video shows one possible way that a river can cross a mountain that already exists.
If a river cuts straight through a mountain, does that mean the river is older and the mountain rose underneath it? This question is often asked about the Susquehanna River, among other Appalachian Rivers. The answer is complicated, and this video lays it out. Rivers are more dynamic than we think, and, over time, they can do all sorts of crazy things. This video shows one possible way that a river can cross a mountain that already exists.
