{
  "feature": "minecraft:disk_gravel",
  "placement": [
    {
      "count": 80,
      "type": "minecraft:count"
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "height": {
        "min_inclusive": {
          "absolute": 50
        },
        "max_inclusive": {
          "absolute": 56
        },
        "type": "minecraft:uniform"
      },
      "type": "minecraft:height_range"
    },
    {
      "type": "minecraft:block_predicate_filter",
      "predicate": {
        "type": "minecraft:matching_fluids",
        "fluids": "minecraft:water"
      }
    },
    {
      "type": "minecraft:biome"
    }
  ]
}