SEDIMENTARY RECORD OF EXTENSIONAL TECTONICS AND EUSTACY IN THE UPPERMOST JURASSIC AND THE LOWERMOST CRETACEOUS SERIES FROM CENTRAL AND EASTERN FORE BALKAN (BULGARIA)

The thick (2 000 m) siliciclastic-dominated synrift series, which fill s up most of the internal troughs of the Central Fore Balkan from Uppe rmost Tithonian to Valanginian, is subdivided into ten ten technoeusta tic depositional sequences. The sequences consist of a coarse and volu minous low stand wedge (block complex, canyon-cone conglomerates, mega slumps, calcareous breccias. etc.) induced by extensional tectonics; a nd above, a pelite-dominated high stand wedge of eustatic origin, whic h contains most of the zonal and subzonal Ammonites allowing datations and correlations. To the IVE, towards the Moesian Platform, only the high stand wedges (with or without the transgressive system tracts) of the successive sequences overflow the troughs and become richer in ca rbonates to the top of the parasequences.