DACIAN BASIN - GeoEcoMar

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202 Chapter 9. Source-Areas in the Geological History of the Dacian Basin FIGURE 9.3. Carpathian source-areas of the Dacian Basin. Interpretation based on the sediment thickness distribution. Isopach maps from Saulea et al. (1969). Contour interval = 100 m. The small arrow represents the diversification of the eastern source sediment supply (more sediment input points). A, B, C, D - see text areal extent (Fig. 9.3 C). The southward extent of the western depocenter also suggests the increased sediment supply (Fig. 9.3 B and C). The sediment supply of the western source-area dropped significantly in the Late Pontian-Dacian time. The sediment accumulation in the western Dacian Basin depocenter reaches a maximum thickness of 300m. The extent of the western depocenter is also reduced during Late Pontian-Dacian (Fig. 9.3 D). The contribution of the western source is not obvious on the Romanian isopachs map configuration (Fig. 3.6). A small western Dacian Basin depocenter is still apparent on the Romanian contour map. The map of the Quaternary sediment thickness distribution in the western part of the Dacian Basin (Ghenea et al., 1971) suggests a decrease in the sediment supply from the western source. This conclusion results from the fact the sediment is thin and no distinct depocenter is visible in the western part of the Dacian Basin (Fig. 9.4 B).
9.4. Southern, Balkanian and Dobrogean source-areas FIGURE 9.4. Sources of detrital material during the Maeotian, according to the Dacian Basin lithology distribution. Lithologic sketches of the Dacian Basin after Saulea et al. (1969) (A); Papaianopol et al. (1987) and Papaianopol, Marinescu (1989) (B). Legend: 1. Clay dominated. 2. Silt dominated. 3. Sand dominated. 4. Gravelly sand 9.4. SOUTHERN, BALkANIAN AND DOBROgEAN SOURCE-AREAS The Dacian Basin isopach maps do not indicate important source-areas other than the Carpathians. On the Pontian isopach maps (Figs 9.3 C and D), the sediments of the southern part of the western Dacian Basin depocenter extend down to the southern limit of the basin, but a contribution from the southern source is not detectable. In Dobrogea, the thickness of the Pontian, Dacian and Romanian deposits cropping out on the right bank of the Danube River, does not exceed 30 m (Andreescu and Pană, in Avram et al., 1996). Lithology distribution maps have been used to indicate sediment accumulation attributed to the southern Dacian Basin source-areas. These data allow to dis- 203
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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 154 and 155: 152 Chapter 6. Upper Neogene Fluvia
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Page 158 and 159: The large and continuous rock expos
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Page 192 and 193: 190 Chapter 8. The Paleoenvironment
Page 200 and 201: The evolution and architecture of a
Page 202 and 203: 200 Chapter 9. Source-Areas in the
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Page 216 and 217: 214 Chapter 10. History of the Daci
Page 232 and 233: 230 Chapter 11. From Brackish-Marin
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252 Chapter 12. From Brackish-Marin
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254 Chapter 12. 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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