Oil ocean
Space Age expansion exclusive feature.
Oil oceans separate the islands of Fulgora. The seas slow down the player and most vehicles, but they can traverse them regardless. However, almost no entities can be built on oil oceans.
Rail supports and ramps can be placed in oil oceans, thus allowing trains to travel between islands. Deep oil ocean tiles, the dark colors, cannot have rail supports or ramps placed on them until Rail support foundations is researched. This technology requires Metallurgic science packs from Vulcanus.
Foundation tiles can be built on oil oceans, and any entity can be placed on foundations. This allows unrestricted building on the oil oceans.
By placing an offshore pump on the edge of an island, heavy oil is infinitely extracted from the oil oceans, much like water is from lakes on Nauvis. Other oil products can be produced via cracking.