Filicophyta, Coniferales, Bennetitales and Equisetales dominate the flora, which indicates the deposition of this formation in relatively tropical and rainy environments in islands, deltas and river banks.

[1][4] Dinosaur footprints The dinosaur footprints of this formation in Mazandaran province include theropods with an average length of about 2 meters, small two-toed Deinonychosaurs, relatively giant sauropods about 9 meters long, and small two-legged ornithopods.

[3][2] It is part of the Shemshak Group, a Late Triassic to Callovian set of coal bearing largely fluvio-lacustrine sediments up to 4000 metres thick located within the Alborz Mountains.

[4] The outcrop of sediments is strongly controlled by numerous fault structures in the region.

Dinosaur tracks are known from the formation, including sauropods, and tridactyl[3] and didactyl theropods.