Rovno amber is found in this formation,[2] and 90% of amber collected from the Obukhov Formation is extracted illegally and the trade is controlled by armed organised crime groups.
[3][2] The formation is found along the northwestern margin of the Ukrainian Crystalline Shield[1] exposed in the Rivne region of Ukraine and across the border near Rechitsa in the Gomel Region of Belarus.
[4] The granite basement rock was overlain by sandy to clayey deposits that were host to alluvial amber.
[2] The two formations total between 2–7 m (6.6–23.0 ft) in thickness, both containing interbeds or mixtures of brown coals and carbonized vegetation.
This article about a specific stratigraphic formation is a stub.