How to Use "Permian" with Example Sentences

1. Most rock sequences that straddle the end of the permian are either incomplete or hard to date .
2. The affinity of associated elements in permian coals from the huaibei coalfield .
3. Some 250 million years ago , at the end of the time known as the permian , life was all but wiped out during a sustained period of massive volcanic eruption and devastating global warming .
4. When grasby and his team analyzed rocks from just before the permian mass extinction , they noticed unusual microscopic particles .
5. Dimetrodon appeared in the late paleozoic era , during the permian period , long before the dinosaurs evolved .