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brokenaloeplant t1_ivb897f wrote

Reply to comment by Zoomalude in What is the cause of the steep escarpment at the base of Olympus Mons? by Strong-Ball-1089

For the material in the middle, it's all surrounded by crystalline rock. It would have nowhere to collapse into, unlike the edges. If there was a ton of air captured inside or there was a hollow cavity like some kind of sink hole, then maybe.

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