#geologist__geophysicist  a specialist in geology
  supertype:  #scientist__man_of_science  a person with advanced knowledge of one of more sciences
  instance:  #Arthur_Holmes  #James_Hutton  #Gideon_Algernon_Mantell  #Henry_Rowe_Schoolcraft  #Alfred_Lothar_Wegener  #John_Tuzo_Wilson
  subtype:  #petroleum_geologist__petroleumgeologist__oil_geologist__oilgeologist  a specialist in petroleum geology

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