Abstract
The basement of the Moesian Platform exposed in central Dobrogea is represented by the Upper Proterozoic Histria Formation. This is a thick turbidifc succession which includes two sandstone-dominated, channelised mid-fan members, separated by a distal fan-abyssal plain sequence. A typical feature of this fine-grained member is the occurrence at the top of the Te Bouma divisions of tiny, flat intraclasts, defining a parallel lamination. This interval with millimetric to centimetric thicknesses was designated the ei interval. It usually occurs at top of T7 or between T3 and T4 subdivisions of muddy turbidites. The internal structure and the geometric position of the e; interval suggests that the depositional mechanism involved erosion of muddy surface sediments by active turbiditic or thermohaline bottom currents, followed by redeposition of the resulted intraformational microclasts by slow settling.
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