{
  "feature": "minecraft:disk_gravel",
  "placement": [
    {
      "type": "minecraft:count_on_every_layer",
      "count": 1
    },
    {
      "type": "minecraft:block_predicate_filter",
      "predicate": {
        "type": "minecraft:matching_fluids",
        "fluids": "minecraft:water"
      }
    },
    {
      "type": "minecraft:biome"
    }
  ]
}