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The Prussian Formation, previously known as the Amber Formation, is a geologic formation in Prussia, today mostly Kaliningrad Oblast that dates to the Eocene. [1] It holds 90% of the world's amber supply and Baltic amber is found exclusively in the Prussian Formation. [2] The Prussian Formation is equivalent to the Obukhov Formation of Ukraine ...
Open pit amber mine in Kaliningrad, showing the lithology of the Prussian Formation, the source rock of Baltic amber. In situ Baltic amber is derived from the sediments of the geological formation termed the Prussian Formation, formerly called the "Amber Formation", with the main amber bearing horizon being referred to as "Blue Earth", so named due to its glauconite content.
Rovno amber, occasionally called Ukrainian amber, [1] is amber found in the Rivne Oblast and surrounding regions of Ukraine and Belarus. The amber is dated between Late Eocene and Early Oligocene, and suggested to be contemporaneous to Baltic amber (Prussian Formation). Major exploration and mining of the amber did not start until the 1990s.
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Baltic amber yields on dry distillation succinic acid, the proportion varying from about 3% to 8%, and being greatest in the pale opaque or bony varieties. The aromatic and irritating fumes emitted by burning amber are mainly from this acid. Baltic amber is distinguished by its yield of succinic acid, hence the name succinite. Succinite has a ...
Small amounts of Baltic amber can even be found outside the Baltic region, for example on the coastline of the south east of England. [ 2 ] However, about 90% [ 3 ] [ 4 ] to 98% [ 2 ] of all output of amber has been produced in the Sambia region (now a Russian exclave , formerly in Eastern Prussia and the Polish–Lithuanian Commonwealth ). [ 2 ]
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