DACIAN BASIN - GeoEcoMar

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Chapter 9. Source-Areas in the Geological History of the Dacian Basin
figuration is well illustrated by the isopach maps of the Middle-Late Sarmatian (s.l.)
and Maeotian sediments (Fig 9.1 A and B). The two areas are less evident but still
visible on the isopach maps of the Pontian sediments (Fig. 9.1 C and D) and barely
recognizable on the Romanian sediments isopach map.
The two separated thick-sediment areas of the Dacian Basin represent large
depocenters, at the scale of the entire basin. Within each depocenter the sediment
thickness distribution pattern indicates that the Carpathians represent the sourcearea
of clastic material, and there are two Carpathian sediment source-areas which
supplied clastic material to the Dacian Basin.
9.3. CARPATHIAN SOURCE-AREAS
The Carpathian eastern source-area. As displayed by the isopach pattern, the most
important depocenter of the Dacian Basin was located toward the eastern part
of the basin (Fig. 9.1). The thickest sediment are located to the north of the depocenter,
toward the northern end of the Dacian Basin (Focşani area) (Fig. 9.1). This
indicates the source-area of this depocenter was in the vicinity of the northern
Dacian Basin, in the south part of the present-day Eastern Carpathians, and close to
the Carpathian bend zone (Fig. 9.2).
FIGURE 9.2. Carpathian sediment source-areas of the Dacian Basin. The Maeotian isopach map
as example. In the background, the Geological map of Romania scale 1:1,000,000 (reduced and
modified) prepared by the Geological Institute of Romania. Isopach map from Saulea et al. (1969).
The assumed extent of the source-areas is hatched