minecraft-src/data/minecraft/worldgen/configured_feature/large_basalt_columns.json

{
  "type": "minecraft:basalt_columns",
  "config": {
    "height": {
      "type": "minecraft:uniform",
      "max_inclusive": 10,
      "min_inclusive": 5
    },
    "reach": {
      "type": "minecraft:uniform",
      "max_inclusive": 3,
      "min_inclusive": 2
    }
  }
}