Safe Shallows Caves

So I have a headcannon about Bart Torgal. we know according to the cinematic trailer that Bart built a base in the safe shallows or the crash zone. Well, we know that the crash zone was a result of the aurora so what if the crash zone was the safe shallows prior to the crash and the reason why we don't find Barts last base is because the Aurora crushed it on impact?