In fact i do have screenshoot of it. I took one at 400 meters depth and you can se the bottom just disapear. And another from 900 meters depth where you can se the wall go stright up from bottom.
Gona fix them and post them here in a while
Edit/
Here are 2 pictures. Its hard to tell from them but you have to imagine the wall goes strigth 500 meter down or up
I also think i can find the spot again so when i do iam gona take a map screen. But that have to be on my next patrol.
At 433 meters:
At 973 meters: