The paper is concerned with Jurassic calcareous nannoplankton from the Dobrudja foredeep. The regional Jurassic stratigraphy based on nannoplankton is considered. The NJ10/Stephanolithion speciosum, NJ11/Pseudoconus enigma, NJ14/Stephanolithion bigotii maximum, and NJ15/Cyclagelosphaera margerelii Zones, consistent with the International Nannoplankton Zonation Scheme, have been recognized in the deposits of the Dobrudja foredeep.

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