Among the two Jurassic period was the longest one.The existence of the period was for about 50 million years whereas permian existed for 35 million years. The duration of Mesozoic era /secondary was 120 million years .
The Paleozoic
The Cretaceous Period was the longest period of time.
The earliest period when amphibious creatures crawled out of the ocean to walk on land would have been the Devonian Period. Following that were the Carboniferous, Permian, Triassic, Jurassic, Cretaceous,Tertiary and Quaternary Periods.
C - PALEOZOIC ERA
No, you are missing about 70 million years. The Triassic period and Permian are between the Pennsylvanian and the Jurassic.
Pangaea came together over a period of time spanning the Carboniferous and Permian periods. It broke up mostly during the Jurassic period.
Permian Period.
The Permian Period was ended by the Permian/Triassic Extinction Event, which wiped out 90% of the species on Earth at that time.
Ther Permian was the last period of the Paleozoic era.
The permian period was the end of the paleozoic era.
Neoprene
It depends. If Seismosaurus hallorum proves to be really a Diplodocus, than that would be the longest known specimen, with a length of about 33 meters. Otherwise, the longest known Diplodocus is about 27-30 meters long.