DACIAN BASIN - GeoEcoMar

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194 Chapter 8. The Paleoenvironmental Significance of Clay in the Dacian Basin FIGURE 8.5. Homogeneous clay with palaeosoil aspects. A to D - Massive clay with calcareous concretions. Late Maeotian, Bădislava River. Vlădeşti village (Argeş County). B - Close up to a calcareous concretion. E - Organic matter-rich clay intercalated in gray homogeneous clay. Slănicu de Buzău River, Dumitreşti (Vrancea County)
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) 195
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Dan C. Jipa, Cornel Olariu DACIAN B
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Dedicated to the memory of Prof. Gh
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NATIONAL INSTITUTE OF MARINE GEOLOG
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CONTENTS Foreword and Acknowledgeme
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Contents Chapter 7. The Point Bar F
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FOREwORD AND ACkNOwLEDgEMENTS The s
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PLATE 1. Location of the Dacian Bas
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18 Chapter 1. Dacian Basin. General
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The analysis of the paleogeographic
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42 Chapter 2. Dacian Basin paleogeo
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58 FIGURE 2.14. Paleogeography and
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68 Chapter 3. Sediment Thickness Di
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Sedimentation in the brackish-water
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84 Chapter 4. Dacian Basin Physiogr
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94 Chapter 5. Littoral Sedimentary
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Fluvial sedimentation played a majo
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136 Chapter 6. Upper Neogene Fluvia
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Page 146 and 147: 144 Chapter 6. Upper Neogene Fluvia
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Page 200 and 201: The evolution and architecture of a
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Page 232 and 233: 230 Chapter 11. From Brackish-Marin
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244 Chapter 11. From Brackish-Marin
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Ai n s w o r t h r. B., Cr o w l e
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258 References hA m o r, g., et al.
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260 References mA C A r o V iC i, n
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262 References ră d A n, s.C., 200
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264 References VAsilieV, i., Kr iJ
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DACIAN BASIN - GeoEcoMar

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