Earth:Prussian Formation

Prussian formation Stratigraphic range: Eocene 56–35 Ma PreЄ Є O S D C P T J K Pg N
Amber with an insect inclusion from the Prussian formation.
Type	Geological formation
Lithology
Other	Phosphorite, Amber
Location
Location	Russia
Type section
Region	Sambian Peninsula

The Prussian Formation is a geologic formation in Prussia, today mostly Kaliningrad Oblast. It holds 90% of the world's amber supply.