Permian to Triassic


The Earth in the Permian period

During the Permian, Britain lay on the supercontinent of Pangaea and experienced hot, dry conditions. Sandstones formed from desert sand dunes. Limestones and salts were deposited in a nearby inland sea (the Zechstein Sea). Many groups of animals became extinct at the end of the Permian.


The Earth in the Triassic period

During the Triassic, a hot and dry environment led to the deposition of sandstones, salts and mudstones in deserts, rivers and shallow lakes. Reptiles were common and the first dinosaurs evolved.

Permian to Triassic

*Based on The Geologic Time Scale 2012 by F M Gradstein, J G Ogg, M Schmitz and G Ogg (2012), with additions.