{
    "feature": {
        "type": "minecraft:disk",
        "config": {
            "state_provider": {
                "fallback": {
                    "type": "minecraft:simple_state_provider",
                    "state": {
                        "Name": "minecraft:smooth_basalt"
                    }
                },
                "rules": []
            },
            "target": {
                "type": "minecraft:matching_blocks",
                "blocks": "minecraft:deepslate"
            },
            "radius": {
                "type": "minecraft:uniform",
                "min_inclusive": 8,
                "max_inclusive": 8
            },
            "half_height": 4
        }
    },
    "placement": [
        {
      "type": "minecraft:height_range",
      "height": {
        "above_bottom": 0
      }
    },
    {
      "type": "minecraft:block_predicate_filter",
      "predicate": {
        "type": "minecraft:all_of",
        "predicates": [
          {
            "type": "minecraft:matching_blocks",
            "offset": [
              0,
              1,
              0
            ],
            "blocks": [
              "minecraft:moss_block"
            ]
          },
          {
            "type": "minecraft:matching_blocks",
            "offset": [
              0,
              2,
              0
            ],
            "blocks": [
              "minecraft:sculk"
            ]
          }
        ]
      }
    },
    {
            "type": "minecraft:count",
            "count": 128
        },
        {
            "type": "minecraft:in_square"
        },
        {
            "type": "minecraft:height_range",
            "height": {
                "type": "minecraft:uniform",
                "min_inclusive": {
                    "absolute": 140
                },
                "max_inclusive": {
                    "absolute": 155
                }
            }
        }
    ]
}