|This article has not been revised for the current version (U40-494396). It was last updated for LU-356355. It may contain inaccuracies.|
Solid Petroleum is the Solid state of Petroleum.
Frozen Petroleum can only withstand about 765kg of pressure without backing. Petroleum freezing under about 4 tiles of liquid petroleum will pressure-fracture itself, deleting half the mass in the process. If there is a continued source of cold, this process can result in a lot of petroleum being deleted.