The Jindong Formation () is a geological formation located in South Korea. It is dated to the Cenomanian-Turonian stages of the Late Cretaceous, between 99.9â¯ñâ¯0.7â¯Ma and 93.1 ñ 0.3 Ma.
The Jindong Formation consists of thick, fine-grained, altered volcaniclastic sediments. Most of these sediments are ash-rich mudstone, siltstone, and very fine sandstone. There are also coarser sandstone, conglomerate, carbonates, and tuff.
The Jindong Formation has yielded numerous of dinosaurs and bird tracks. Ichnofossils including unnamed tracks of sauropods and pterosaurs, the isolated sauropod skin impression not associated with trackways, and the poorly preserved juvenile sauropod trackway with no ichnotaxon assignment have been reported.