DACIAN BASIN - GeoEcoMar

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182 Chapter 7. The Point Bar Facies in the Jilţ Quarry (Romanian Deposits) FIGURE 7.25. Sedimentary features of the mud drapes. Jilţ Quary, E13 mining front. A. Clay drape with sandy laminae in the lower part of the bed. Rugged boundaries. B. Clay drape unit with a pinching out sandy interval in the middle. C and D. Clay drapes including many small sand bodies (current structure is evident in picture D). E. Fining upward clay drape unit. Erosional upper boundary. F. Mud drape with flat lower bed boundaries and irregular, erosional upper limit Down-dip extent of the mud drapes. Mapping the point bar deposits that crop out in the Jilţ South Quarry, it was established that the mud drapes never extend down-dip into the base part of the point bar (Fig. 7.21). In figure 7.28 the mud drapes lower extent is limited to a certain point bar basal level. This level of maximal down-dip extent appears to be the same, no matter if the point bar basal part is coarser-grained or finer-grained. Practically, all the down-dip terminations of the mud drapes are of erosional nature. It appears that the high sedimentary dynamics characteristic for the base of the point bar sedimentary sequence (corresponding to the fluvial channel) is the main factor that limited the extent of the mud drapes.
7.3. Mud drapes characters and distribution FIGURE 7.26. Mud drapes erosional terminations. A and B. Mud drapes (M.D.) erosionaly cut and clay pebbles (C.P.) accumulated on the erosion surface. C. Graphic presentation of the pebbles accumulation at the eroded end of the clay drapes (as in picture B) 183
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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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Page 134 and 135: 132 Chapter 5. Littoral Sedimentary
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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
Page 214 and 215: 10.1. SEDIMENT ACCUMULATION AREAS I
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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232 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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