Adds geothermal power.
Geothermal patches spawn in the world
Geothermal wells and heat exchangers to convert superheated water to steam
Advanced Geothermal research also unlocks the steam turbine (nuclear power still does as well)
Integration with AlienBiomes; if installed, geothermal patches only spawn in volcanic regions, but are much more common there
Integration with AlienBiomes; if spawned in a colored volcanic biome, geothermal patches can match the color; patches in these regions yield trace resources as well as hot water