{
  "feature": {
    "type": "minecraft:netherrack_replace_blobs",
    "config": {
      "state": {
        "Name": "minecraft:blackstone",
        "Properties": {
          "axis": "y"
        }
      },
      "target": {
        "Name": "minecraft:deepslate",
        "Properties": {
          "axis": "y"
        }},
      "radius": {
        "type": "minecraft:uniform",
        "value": {
          "min_inclusive": 5,
          "max_inclusive": 12
        }
      }
    }
  },
  "placement": [
    {
      "type": "minecraft:count",
      "count": {
        "type": "minecraft:weighted_list",
        "distribution": [
          {
            "weight": 100,
            "data": 256
          }
        ]
      }
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:height_range",
      "height": {
        "type": "minecraft:uniform",
        "min_inclusive": {
          "above_bottom": 32
        },
        "max_inclusive": {
          "absolute": 0
        }
      }
    },
    {
      "type": "minecraft:biome"
    }
  ]
}
