DACIAN BASIN - GeoEcoMar

More documents

Recommendations

Info

140 Chapter 6. Upper Neogene Fluvial Sedimentation in the Dacian Basin FIGURE 6.6. Distribution of bed thickness values for Romanian sand/silt fluvial deposits TAbLE 6.1. Sand to clay ratio of some fluvial deposits in the Dacian Basin. The figures are rough estimations resulted from comparison between sequences that are different in scale and detail of observation. Geological section Morunglav borehole Middle Dacian - Romanian Prahova River Romanian Doftana River Late Maeotian Bizdidel River Late Maeotian Râmnicu Sărat River Romanian Sand (and sandy) (%) Clay (and clayey) (%) 52 48 21 79 36 64 78 22 40 60
6.1. Sedimentary characteristics of the fluvial deposits in the Dacian Basin 6.1.2. graded bedding The size variation of the clastic particles from the base to the upper part of a sedimentary unit represents an important character in the genetic interpretation of the fluvial Dacian Basin deposits. The fining upward trend was interpreted in our study of the Dacian Basin as a characteristic of the fluvial sediment accumulation. The complete fining upward, from very coarse-grained sands to clay, was rarely noticed (Fig. 6.7). When the sediment sorting is advanced and the bottom grain-size is in the fine-grained sand range, the coarsening upward is visible only in the upper part of the bed (Fig. 6.8). The fining upward expressed by a decrease in grain-size from the bottom of the bed, is more frequent in case of some conglomeratic units (Fig. 6.9). FIGURE 6.7. Composite images of the complete, fining upward sedimentary units, in the fluvial Middle Dacian - Romanian deposits from the Dacian Basin. Legend: 1. Clay. 2. Silt. 3. Fine and very fine-grained sand. 4. Medium and coarse-grained sand. 5. Very coarse-grained sand and very finegrained gravel. 6. Fine and medium-grained gravel 141
Page 1:
Dan C. Jipa, Cornel Olariu DACIAN B
Page 5:
Dedicated to the memory of Prof. Gh
Page 8 and 9:
NATIONAL INSTITUTE OF MARINE GEOLOG
Page 11 and 12:
CONTENTS Foreword and Acknowledgeme
Page 13 and 14:
Contents Chapter 7. The Point Bar F
Page 15 and 16:
FOREwORD AND ACkNOwLEDgEMENTS The s
Page 17:
PLATE 1. Location of the Dacian Bas
Page 20 and 21:
18 Chapter 1. Dacian Basin. General
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
The analysis of the paleogeographic
Page 44 and 45:
42 Chapter 2. Dacian Basin paleogeo
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
58 FIGURE 2.14. Paleogeography and
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
68 Chapter 3. Sediment Thickness Di
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Sedimentation in the brackish-water
Page 86 and 87:
84 Chapter 4. Dacian Basin Physiogr
Page 88 and 89:
Page 90 and 91:
Page 92 and 93: 90 Chapter 4. Dacian Basin Physiogr
Page 94 and 95: 92 Chapter 4. Dacian Basin Physiogr
Page 96 and 97: 94 Chapter 5. Littoral Sedimentary
Page 136 and 137: Fluvial sedimentation played a majo
Page 138 and 139: 136 Chapter 6. Upper Neogene Fluvia
Page 158 and 159: The large and continuous rock expos
Page 160 and 161: 158 Chapter 7. The Point Bar Facies
Page 192 and 193:
190 Chapter 8. The Paleoenvironment
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
The evolution and architecture of a
Page 202 and 203:
200 Chapter 9. Source-Areas in the
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
10.1. SEDIMENT ACCUMULATION AREAS I
Page 216 and 217:
214 Chapter 10. History of the Daci
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
230 Chapter 11. From Brackish-Marin
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Ai n s w o r t h r. B., Cr o w l e
Page 260 and 261:
258 References hA m o r, g., et al.
Page 262 and 263:
260 References mA C A r o V iC i, n
Page 264 and 265:
262 References ră d A n, s.C., 200
Page 266:
264 References VAsilieV, i., Kr iJ
show all

DACIAN BASIN - GeoEcoMar

Create successful ePaper yourself

Delete template?

Save as template?