The Tangbian Formation is a geological formation in Jiangxi Province, east China. While its absolute age is uncertain, it has been estimated to represent Late Cretaceous (Campanian age) sediments. Dinosaur bones and eggs are among the fossils recovered from the formation.
The Tangbian Formation is known from outcrops in the Xinjiang Basin of Jiangxi Province, southeastern China. It is part of the Late Cretaceous Guifeng Group, underlain by the Hekou Formation and overlain by the Lianhe Formation in that group. The formation is interpreted as Campanian in age, although absolute dates have not been obtained. It comprises thick beds of fine-grained red-purple sandstone interbedded with mudstone, calcareous sandstone, and siltstone, and was deposited in an aeolian (wind-driven) setting representing a desert environment.
The Tangbian Formation contains a rich record of dinosaur egg fossils and embryos. Most of the known egg clutches can be associated with oviraptorosaurs, although rarer egg fossils are known from hadrosaurs, troodontids, and possibly dromaeosaurids.