DACIAN BASIN - GeoEcoMar

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20 Chapter 1. Dacian Basin. General Background Due to a major Pliocene paleoenvironmental change affecting the Dacian Basin (passage from brackish to fresh-water environment), the stages corresponding to this period of time (i.e. Dacian and Romanian) have been built up on biostratigraphic features typical of the Dacian Basin (Table 1.1). Stages (and authors) ROMANIAN (S. Ştefănescu, 1888) Levantin (N. Mihăilă, 1969) <strong>DACIAN</strong> (W. Teisseyre, 1907) TAbLE 1.1. The biostratigraphic scale used in the Dacian Basin area PONTIAN (Barbot de Marny, 1869; N. Andrusov, 1897) MAEOTIAN (N. Andrusov, 1890) SARMATIAN (s.l.) (Barbot de Marny, 1869) Substages (and authors) Valahian (I. Andreescu, 1981) Pelendavian (I. Andreescu, 1981) Siensian (I. Andreescu, 1981) Parscovian (I. Andreescu, 1972) Getian (N. Macarovici, Fl. Marinescu, I. Motaş, 1995) Bosphorian (N. Andrusov, 1923) Portaferrian (P. M. Stevanovic, 1952) Odessian (N. Macarovici, Fl. Marinescu, I. Motaş, 1995) Moldavian (M. David, 1922) Oltenian (I. Atanasiu, 1940) Kersonian (I. Simionescu, 1903) Bessarabian (I. Simionescu, 1903) Volhynian (I. Simionescu, 1903)
1.2. Stratigraphy FIGURE 1.3. Paratethys domain during the Maeotian time. Simplified and modified after Ilyina et al. (in Popov et al., 2004), Papaianopol et al. (1987) and Magyar et al. (1999). The Sarmatian stage, which includes the time when the Dacian Basin formed, is one of the highly disputed biostratigraphic units. The Sarmatian as a stratigraphic concept comes from E. Suess (1866), and it was initially used in the Vienna Basin. Later on, scientists realized that the term Sarmatian was used for two stratigraphic intervals of quite different extent (Fig. 1.4). Consequently, in this book, the term Sarmatian has the sensu lato meaning whenever it is used in the Dacian Basin context. The Maeotian stage was defined by Andrusov (1890) in the Kerch peninsula. The Maeotian sequence of the Dacian Basin is rather different from the stratigraphically similar succession in the Euxinian Basin. Only the “Dosinia beds” episode shows faunal similarities with the Euxinian Maeotian sequence. The Pontian stage is also of Euxinian origin, vaguely outlined by Barbot de Marny (1869) and defined more precisely later by I.F. Sinzov. There are significant biostratigraphic differences between Dacian and Euxinian meanings of the Pontian sedimentary succession, but the similarities outnumber the dissimilarities. The Maeotian and Pontian substages in the Dacian Basin (Table 1.1) reflect the regional ecological and faunal particularities of the basin, during a time when the basin was into an advanced stage of infilling with sediments. The Paratethys stratigraphic scales are built up using ecological stages. Although all the major water basins of the Paratethys were brackish, important differentiation existed between salinity ranges and ecological conditions. The distinction between an oligohaline biotope and a mesohaline biotope is of a similar impact as the difference between the brackish and normal-marine biotopes. Consequently, the tem- 21
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 42 and 43: The analysis of the paleogeographic
Page 44 and 45: 42 Chapter 2. Dacian Basin paleogeo
Page 60 and 61: 58 FIGURE 2.14. Paleogeography and
Page 70 and 71: 68 Chapter 3. Sediment Thickness Di
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70 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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The large and continuous rock expos
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158 Chapter 7. The Point Bar Facies
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190 Chapter 8. The Paleoenvironment
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The evolution and architecture of a
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200 Chapter 9. Source-Areas in the
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10.1. SEDIMENT ACCUMULATION AREAS I
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214 Chapter 10. History of the Daci
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230 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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