Individual #Carboniferous_period__Carboniferous  from 280 million to 345 million years ago
  instance of:  geological_period
  part of:  Paleozoic_era
  part:  Pennsylvanian_period__Pennsylvanian__Upper_Carboniferous__Upper_Carboniferous_period  from 280 million to 310 million years ago; warm climate; swampy land
  part:  Missippian_period__Mississippian__Lower_Carboniferous__Lower_Carboniferous_period  from 310 million to 345 million years ago; increase of land areas; primitive ammonites; winged insects

No statement uses or specializes Carboniferous_period; click here to add one.