Ashizawa Formation

Ashizawa Formation Stratigraphic range: Coniacian
Type	Geological formation
Location
Region	northern Honshu
Country	Japan

The Ashizawa Formation is a Mesozoic 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.

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