Volcanic ash soil

Volcanic ash soil is a terrain tile in Factorio that represents ground covered by volcanic ash; it is a map surface tile classified under the game's terrain system. As a tile, Volcanic ash soil is used to form the visual and physical ground on which buildings, entities and paths are placed, and it is created by the map generator or by tile-placement tools in map editing and scripting. The entity is identified in game data as the Volcanic ash soil tile type and serves as one of several terrain options for customizing the world surface.