minecraft-assets/data/minecraft/worldgen/density_function/overworld_large_biomes/erosion.json

{
  "type": "minecraft:flat_cache",
  "argument": {
    "type": "minecraft:shifted_noise",
    "noise": "minecraft:erosion_large",
    "shift_x": "minecraft:shift_x",
    "shift_y": 0.0,
    "shift_z": "minecraft:shift_z",
    "xz_scale": 0.25,
    "y_scale": 0.0
  }
}