At the beginning when the Paramount pictures logo is shown there is a transition between the Paramount pictures logo and the film - the camera zooms in on the mountain then starts to move down through the mountain to the core of the earth.
During the first part of the film's closing credits, the camera zooms out from the Earth as the credits appear. When the film's title appears, the 'O' is actually the earth. The rest of the first part of the closing credits, which is the cast, is just set against a black background.
Bruce Greenwood's character, Robert Iverson, is incorrectly referred to as "Richard Iverson" in the credits.
Outer Core Supervisor