Learn about the geologic forces that continue to change the dramatic scenery of Jackson Hole. Find out why the Teton Range rises abruptly from the valley and how the Teton fault and glacial ice shape the landscape.
Motion on the Teton fault began about 10 million years ago lifting the mountains skyward and hinging the valley down. It is only a matter of time before another earthquake lifts the mountains and drops the valley floor.
2 minutes, 16 seconds
Last updated: February 24, 2015
P.O. Box 170
Talk to a Ranger? To speak to a Grand Teton National Park ranger call 307–739–3399 for visitor information Monday-Friday during business hours.