{
  "format_version": "1.13.0",
  "minecraft:tree_feature": {
    "description": {
      "identifier": "minecraft:fallen_spruce_tree_feature"
    },
    "fallen_trunk": {
      "log_length": {
        "range_min": 6,
        "range_max": 10
      },
      "trunk_block": {
        "name": "minecraft:spruce_log"
      },
      "log_decoration_feature": "minecraft:optional_log_mushrooms_feature"
    },
    "base_block": [
      "minecraft:dirt",
      "minecraft:coarse_dirt"
    ],
    "may_grow_on": [
      "minecraft:dirt",
      "minecraft:grass_block",
      "minecraft:podzol",
      "minecraft:dirt_with_roots",
      "minecraft:moss_block",
      "minecraft:coarse_dirt"
    ],
    "may_replace": [
      "minecraft:air",
      "minecraft:oak_leaves",
      "minecraft:spruce_leaves",
      "minecraft:birch_leaves",
      "minecraft:jungle_leaves",
      "minecraft:acacia_leaves",
      "minecraft:dark_oak_leaves"
    ],
    "may_grow_through": [
      "minecraft:dirt",
      "minecraft:grass_block",
      "minecraft:coarse_dirt"
    ]
  }
}