Simple categories matching alluvial:

• material,
• soil,
• item,
• sediment,
• deposit,

Members with property alluvial:

• river_gravel,
• sand,
• leaf_litter,
• gravel,
• lacustrine_deposit,
• loam,
• shell,
• clay,
• mississippi-river_delta,
• heavy_loam,
• river_delta,
• small_pebble,
• gravel_sheet,
• samuel_loam,
• silt,
• peat,
• sandy_loam,
• basaltic_lava,
• stone,
• lime,