#geological_process  a natural process whereby geological features are modified
  supertype:  natural_process__naturalproces__natural_action__naturalaction__action__activity  a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
  subtype:  alluvion  gradual formation of new land, by recession of the sea or deposit of sediment
  subtype:  diastrophism  the process of deformation that produces continents and ocean basins in the earth's crust
  subtype:  eroding__erosion__eatingaway__wearing__wearing_away__wearingaway  the mechanical process of wearing or grinding something down (as by particles washing over it)
     subtype:  chatter_mark.eroding__chattermark  marks on a glaciated rock caused by the movement of a glacier
     subtype:  ablation  the erosive process that reduces the size of glaciers
     subtype:  corrasion__abrasion__attrition__detrition  erosion by friction
     subtype:  beach_erosion__beacherosion  the erosion of beaches
     subtype:  planation  the process of erosion whereby a level surface is produced
     subtype:  soil_erosion  the washing away of soil
  subtype:  glaciation  the process of covering with glaciers or masses of ice
  subtype:  metamorphism  change in the structure of rock by natural agencies such as pressure or heat of introduction of new chemical substances
     subtype:  anamorphism  occurs deep under the earth's surface; changes simple minerals into complex minerals
     subtype:  epigenesis  a geological change in the mineral content of rock after the rock has formed
     subtype:  katamorphism  occurs at or near the earth's surface; breaks down complex minerals into simpler ones
  subtype:  stratification.geological_process  forming or depositing in layers
     subtype:  foliation  the arrangement of leaflike layers in a rock

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