So in level 27, you have to dig your way out of the elevator to get to the rest of the level. This isn't a problem in and of itself, but there is a larger issue with getting back. After completing the level, I had no more supports available (a way to collapse them instead of just destroying them could have solved the problem for me, but only maybe) and did not use them on my path out of the elevator.
The rate at which large fossils were spawning out side of the elevator made it almost impossible to get to the elevator. If 2x2 fossils spawn in such a way that you can't get to all the dirt on them, they just stop you from reaching the exit. I have a video I can provide to show this issue, but I think that the path from the elevator stright south should not be allowed to spawn large fossils and it will not be an issue.