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I'm trying to write a story where the main characters discover the wreckage of a spaceship in the fields that border their town to the west. To the east, there's the end of a large mountain range.
Basically, the town's built into the side of the mountain. Does a mountain range have to be preceeded by foothills, or can a mountain range transition quickly into a relatively flat landscape? And if so, where on Earth has this happened?





1Welcome to Worldbuilding! Do take a minute to review the [help] and [tour] so you'll understand how things work here. This question definitely needs to be smoothed out a bit per L. Dutch's point. Also, this question is probably more suitable for the geology SE. Even though you mention story aspects, there's no actual worldbuilding going on here. – elemtilas – 2018-11-29T02:26:32.470
I thought this was about subsidence. "Is there landscape that transitions abruptly from plains to mountains?" Mountains themselves transitioning would be a bad day, like the caldera in Yellowstone when it blows. – Mazura – 2018-11-30T23:52:08.160