Geothermal Core is a room in the Magmoor Caverns area of Metroid Prime. It has three pillars in a large pool of magma which requires power from a Spinner. By using the Spinner, the rotating lift platforms on the pillars rise and release access to a Bomb Slot. Activating this Bomb Slot will cause the pillars to raise the roof and a large and long Spider Ball Track will be revealed that lines the wall in a maze-like pattern. Samus has to roll across tracks, plates and tubes and sometimes even has to drop herself several meters in order to reach the next track. At the end of the track there is a door that leads to the Plasma Processing room, with Bendezium (in PAL and Japanese versions) blocking the door. Later in the game, both Puddle Spores will disappear from the room.