{
  "format_version": "1.21.110",
  "minecraft:biome": {
    "description": {
      "identifier": "minecraft:extreme_hills_mutated"
    },
    "components": {
      "minecraft:climate": {
        "downfall": 0.3,
        "snow_accumulation": [ 0.0, 0.125 ],
        "temperature": 0.2
      },
      "minecraft:overworld_height": {
        "noise_type": "extreme"
      },
      "minecraft:surface_builder": {
        "builder": {
          "type": "minecraft:overworld",
          "sea_floor_depth": 7,
          "sea_floor_material": "minecraft:gravel",
          "foundation_material": "minecraft:stone",
          "mid_material": "minecraft:dirt",
          "top_material": "minecraft:grass_block",
          "sea_material": "minecraft:water"
        }
      },
      "minecraft:surface_material_adjustments": {
        "adjustments": [
          {
            "materials": {
              "mid_material": "minecraft:gravel",
              "top_material": "minecraft:gravel"
            },
            "noise_frequency_scale": 0.0625,
            "noise_range": [ -1.0, -0.012 ]
          },
          {
            "materials": {
              "mid_material": "minecraft:gravel",
              "top_material": "minecraft:gravel"
            },
            "noise_frequency_scale": 0.0625,
            "noise_range": [ 0.024, 1.0 ]
          }
        ]
      },

      "minecraft:tags": {
        "tags": [
          "animal",
          "extreme_hills",
          "monster",
          "mutated",
          "overworld",
          "spawns_cold_variant_farm_animals"
        ]
      }
    }
  }
}