{
  "feature": "geophilic:rocks/cobblestone",
  "placement": [
    {
      "type": "minecraft:count",
      "count": {
        "type": "minecraft:weighted_list",
        "distribution": [
          {
            "weight": 1,
            "data": {
              "type": "minecraft:biased_to_bottom",
              "value": {
                "min_inclusive": 0,
                "max_inclusive": 1
              }
            }
          }
        ]
      }
    },
    {
      "type": "minecraft:rarity_filter",
      "chance": 3
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:surface_water_depth_filter",
      "max_water_depth": 0
    },
    {
      "type": "minecraft:heightmap",
      "heightmap": "OCEAN_FLOOR"
    },
    {
      "type": "minecraft:biome"
    },
    {
      "type": "minecraft:block_predicate_filter",
      "predicate": {
        "type": "minecraft:matching_blocks",
        "blocks": "minecraft:air"
      }
    }
  ]
}
