| Article |
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| Article name |
Paleoecological and Taphonomic Biota Features of the Jurassic Dinosaurs’ Locality (Kulinda, Olov Depression, Transbaikalia) |
| Authors |
Sinitsa S.M. Doctor of Geology and Minerology, Associate Professor, sinitsa-sm@rambler.ruVil’mova E.S. Senior Lecturer, zvezdochka_kiss_@mail.ru |
| Bibliographic description |
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| Section |
PALEOBIOLOGY |
| UDK |
551.75 |
| DOI |
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| Article type |
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| Annotation |
In 2010, the remains of Jurassic feathered dinosaurs, the smallest on the planet, were found in deposits of Ukureyskaya Formation, Olov Depression. Accompanying organic remains are presented by species-indexes of Late Jurassic Unda-Daya complex: tadpole shrimps, insects and horsetails. These remains form different types of burials. They are characterized by different preservation, various quantitative and qualitative content, and are confined to specific facies. Special terms which denote the accumulations of remains such as thanatocoenosis, merocoenosis, ichnocoenosis, and oryctocoenosis are used in paleoecological and taphonomic analyzes. Practically all these known accumulations are examined in the deposits of Ukureyskaya Formation, Kulinda locality. The suite is divided into three sub-suites. Dinosaurs’ remains time to the deposits of lower sub-suite. Lower sub-suite consists of sandstone-siltstone, tuffaceous-sedimentary and tuffaceous members. They are defined mainly by allochthonous thanatocoenoses, merocoenosis of dinosaurs’ remains and plant ones, and autochthonous ichnocoenosis. Individual Kulinda early, middle and late complexes of organic remains are set up for each member. Bony remains of limbs, pelvic and shoulder girdles, skulls, vertebrae, scapulae, phalanges, ribs composing merocoenosis are common to these three complexes. The early complex of sandstone-siltstone member (trench 4) sharply differs from the rest by the presence of different granulose skin, feather-like structures and scaly tails. The complex of tuffaceous member (trench 3) is marked by the absence of scaly tails, granulose skin, but by the dominance of coarse feather-like structures. It is examined as the late complex. Tuffaceous-sedimentary member (trench 3(3)) is characterized by bone material which is comparable to that of trenches 4 and 3, single scaly tails, different granulose skin and fine feather-like structures. These facts allow us to compare this complex of remains with the complex of trench 4. The presence of interbeds of arena allows us to compare it with the cut of trench 3 and mark it out as the middle transition complex.
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| Key words |
Ukureyskaya Formation, Upper Jurassic, Olov Depression, dinosaurs, tadpole shrimps, oryctocoenosis, merocoenosis, ichnocoenosis, thanatocoenosis. |
| Article information |
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| References |
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