How to Renew Old Mountain Ranges

Conventionally, there are two ways to build mountains--direct collision (as is the case with the Himalayas) and one side sinking beneath the other (which explains why the Pacific Ring of Fire is volcanic.)

But in an alternate Earth, we have found an Appalachian Mountain chain in which the highest peak is 20,308 feet above sea level and nearly all are shaped like the Tetons. The mystery is that we have found no evidence that this came from subduction or continent-continent collision, but something did push the mountain range back up after millions of years of inactivity and erosion. What else could bring old mountain ranges like the Appalchians back up?

posted over 4 years ago

JohnWDailey‭

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