Minecraft wiki entry for Mountains, associated text: These are the six related sub-biomes that generate in mountainous terrain in areas with low erosion values. They all can generate pillager outposts, with the meadow also being able to generate villages and snowy slopes being able to generate igloos. Some of these biomes are the only places where goats can spawn in the game. Just like the windswept hills, emerald ores can be found in these biomes, especially at higher altitudes and both coal and iron ores are commonly found in the peaks.