DACIAN BASIN - GeoEcoMar

11.1. Late Pontian-Romanian regressive unit
FIGURE 11.8. Occurrence extent of the Early Dacian coarsening upward interval (a). The coarsening
upward sequences occur all over the Dacian Basin area, except for the northernmost area (d).
Legend: a - the coarsening upward interval marked by funnel-type logs; b - geophysical logs;
c - Dacian/Pontian stratigraphic boundary; d - the northern Dacian Basin area
Taking into account the time required for the shoreline sediments to prograde
from the Carpathian Mountains to the southern limit of the basin, it can be considered
that the sub-Carpathian coarsening upward deposits are older than the
similar deposits in southern locations.
The diachronous character is obvious when the extent of the coarsening upward
stratigraphic level is superposed on the Dacian-time paleogeographic maps
of the Dacian Basin (Marinescu and Papaianopol, 1995) (Fig. 11.9). Consequently,
the occurrences of the coarsening upward bodies from the central and northwestern
part of the basin are of Early Dacian age. Some of the southern locations
(close to the present-day Danube River course), where the coarsening upward unit
was identified, occur into the area of the Late Dacian deposits.
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