Ashizawa Formation

The Ashizawa Formation is a Coniacian geologic formation in northeastern Honshu, Japan. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. A jawbone belonging to a therian mammal has also been discovered from this unit.

Palaeofauna

 * Dinosauria indet.
 * Squalus sp.
 * Theria indet.
 * Theropoda indet. ("Futabasaurus") - "tibia"