Ghost Rock is a mineral that burns hotter and longer than coal and is used as the basis for most Deadlands technology as well as alchemical potions and semi-magical materials.

It was originally discovered in the Great Maze and Gomorra is located on top of what seems to be the Maze's greatest concentration of Ghost Rock.

It is precisely this discovery that made Gomorra a boomtown which was fought over by the various outfits in the game.