Geological Periods
The Permian is the last period of the Paleozoic era. It covers from the end of the Carboniferous (299.0 ± 0.8 million years ago) to the beginning of the Triassic (251.0 ± 0.4 million years ago).
The Carboniferous is the period of the Paleozoic era that covers from the end of the Devonian (359.2 ± 2.5 million years ago) to the beginning of the Permian (299.0 ± 0.8 million years ago).
The Devonian is the name given to the geological period that extended from the end of the Silurian (416 million years ago) to the beginning of the Carboniferous (358.9 million years ago).