This zone has thought to have been formed by the bending of the lithosphere resulting from subduction processes ( causing gravity sliding and faulting ).
2.
Moments later the gravity slide forces both the " Neptune " and the " Snark " from the ledge and to the bottom of the sea.
3.
Ultimately, the surviving members of the crew are rescued by the DSRV, thanks to Gates sacrificing himself by using the " Snark " to jam the " Neptune " in place as another gravity slide begins while the rescue is taking place.