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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.
Fossil resins from the Americas and Africa are closely related to the modern genus Hymenaea, [29] while Baltic ambers are thought to be fossil resins from plants of the family Sciadopityaceae that once lived in north Europe. [30] Baltic amber with inclusions
Charentese amber - opaque amber found in the Aquitaine Basin, France. Cretaceous (Cenomanian) age. Cambay amber - amber from Gujarat, India, unlike most ambers readily dissolves in solvents, Eocene age. Dominican amber - nearly always transparent, and having a higher number of fossil inclusions than Baltic amber, Miocene age amber.
When described Pachycondyla succinea was known only from three queen fossils which were fossilized as inclusions in transparent chunks of Baltic amber [1] [2] which are now presumed lost. [3] Additional queens have since been found in Baltic, Rovno, and Scandinavian amber. [1] Males were later identified from Baltic and Bitterfeld ambers. [3] [4]
The fossils were discovered preserved as inclusions in transparent chunks of Baltic amber. [1] Baltic amber is approximately forty six million years old, having been deposited during Lutetian stage of the Middle Eocene. There is debate on what plant family the amber was produced by, with macrofossil and microflossil evidence suggesting a Pinus ...
Fossils found in amber, particularly from the Baltic and Myanmar (Burma), have been assigned to a number of extant and extinct genera placed in the family Archaeidae. [5] The extinct species Burmesarchaea grimaldii (syn. Afrarchaea grimaldii) was found in Burmese amber dated to 88–95 Mya. [6]