Prussian formation
Stratigraphic range: Eocene 56–35 Ma

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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.[1]

## References

1. ↑ G.s, Kharin; N.p, Lukashina (2002). ACCUMULATION CONDITIONS AND CORRELATION OF THE UPPER EOCENE AMBER-BEARING PRUSSIAN FORMATION, KALININGRAD REGION. ISSN 0869-5938. https://repository.geologyscience.ru/handle/123456789/28976.

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