DACIAN BASIN - GeoEcoMar

8.4. The paleobiologic environment and the clay facies
8.4. THE PALEOBIOLOgIC ENvIRONMENT AND THE CLAY FACIES
The investigation of the Late Maeotian - Early Pontian sediments occurring on
the Bizdidel River was approached from two sides, in order to reveal the sedimentogenetic
features and their paleobiologic significance. The study of the biotopes,
carried out by Radu Olteanu (in Jipa, Olteanu, 2005), relied on the analysis of the
ostracod fauna.
The study of the ostracod fauna differentiated four succeeding Late Maeotian–
Early Pontian ecological sequences (Fig. 8.6):
■ ecological sequence A (Upper Maeotian), with mixed fresh-water and brackish
ostracod fauna, interpreted as representing a coastal plain periodically
invaded by brackish water;
FIGURE 8.6. Paleobiologic environment of the bedded and non-bedded clay, based on ostracod
fauna analysed by Radu Olteanu. Note the uppermost, apparently stratified Late Maeotian
clay deposit (samples 147 to 150) which belongs to the fluvial, fresh-water environment. Late
Maeotian-Early Pontian, Bizdidel River, Pucioasa (Dâmboviţa County).
Modified from Jipa, Olteanu (2005)
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