Individual #Paleocene_epoch__Paleocene  from 58 million to 63 million years ago; appearance of birds and earliest mammals
  instance of:  #epoch
  part of:  #Tertiary_period__Tertiary  from 2 million to 63 million years ago
     part of:  #Cenozoic_era__Cenozoic__Age_of_Mammals  approximately the last 63 million years

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