This caramel-brown type of rock that the striped biomes of Canyons are made of is the rarest type of canyonstones and can only be found rather high up. Stone Mining Cells are needed to mine this rock. Mining/taking Canyonstone for the first time will automatically unlock the crafting-recipe for Stucco Wall which will then unlock many more Canyon-related recipes when being crafted/taken. When Canyonstones are placed as they are, Dustevils can spawn on or near them during the (ingame-)day, also - more rarely - Trogs, ordinary Leafies or even Dried Leafis, and Night Leafies during the night.