{
  "format_version": "1.13.0",
  "minecraft:biome": {
    "description": {
      "identifier": "extreme_hills"
    },
    "components": {
      "minecraft:climate": {
        "downfall": 0.3,
        "snow_accumulation": [ 0.0, 0.25 ],
        "temperature": 0.2
      },
      "minecraft:overworld_height": {
        "noise_type": "extreme"
      },
      "minecraft:surface_parameters": {
        "sea_floor_depth": 7,
        "sea_floor_material": "minecraft:gravel",
        "foundation_material": "minecraft:stone",
        "mid_material": "minecraft:dirt",
        "top_material": "minecraft:grass",
        "sea_material": "minecraft:water"
      },
      "minecraft:surface_material_adjustments": {
        "adjustments": [
          {
            "materials": {
              "mid_material": "minecraft:stone",
              "top_material": "minecraft:stone"
            },
            "noise_frequency_scale": 0.0625,
            "noise_range": [ 0.121, 1.0 ]
          }
        ]
      },
      "minecraft:overworld_generation_rules": {
        "hills_transformation": "extreme_hills_plus_trees",
        "mutate_transformation": "extreme_hills_mutated",
        "generate_for_climates": [
          [ "medium", 1 ],
          [ "cold", 1 ]
        ]
      },

      "animal": {},
      "extreme_hills": {},
      "monster": {},
      "overworld": {}
    }
  }
}