{
  "format_version": "1.21.40",
  "minecraft:single_block_feature": {
    "description": {
      "identifier": "minecraft:sulfur_spring_tuff_feature"
    },
    "places_block": [
      {
        "block": "minecraft:tuff",
        "weight": 1
      }
    ],
    "may_replace": [
      // Blocks that compose the surface of the overworld.
      // Keep aligned with each "minecraft:sulfur_spring_xxx_feature".
      { "tags": "query.any_tag('dirt', 'sand', 'gravel')" },
      "minecraft:stone",
      "minecraft:granite",
      "minecraft:diorite",
      "minecraft:andesite",
      "minecraft:tuff",
      "minecraft:deepslate",
      "minecraft:calcite",
      "minecraft:sandstone",
      "minecraft:red_sandstone",
      "minecraft:hardened_clay",
      "minecraft:brown_terracotta",
      "minecraft:orange_terracotta",
      "minecraft:light_gray_terracotta",
      "minecraft:red_terracotta",
      "minecraft:white_terracotta",
      "minecraft:yellow_terracotta"
    ],
    "may_attach_to": {
      "min_sides_must_attach": 1,
      "top": "minecraft:air"
    },
    "enforce_placement_rules": false,
    "enforce_survivability_rules": false
  }
}