the world > the earth > structure of the earth > age or period > [adjective] > primary or Palaeozoic > carboniferous > specific period (2)
Geology. Designating or relating to a period of the Palaeozoic era, between about 345 and 320 million years ago, which followed the Devonian and…
Geology. Designating or relating to a period of the Palaeozoic era, between about 320 and 290 million years ago, which followed the Mississippian and…