#sedimentation__deposit__alluviation  the phenomenon of sediment or gravel accumulating
  supertype:  #geological_phenomenon  a natural phenomenon involving the structure or composition of the earth
  subtype:  #lode__load  a deposit of valuable ore occurring within definite boundaries separating it from surrounding rocks
     subtype:  #mother_lode__champion_lode  the main vein of ore in a deposit

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