Article
Article name HYPOSTRATOTYPES OF THE UKUREYSKAYA FORMATION OF NOVOBEREZOVKA AND OLOVSKAYA DEPRESSIONS OF TRANSBAIKALIA (PART 2. HYPOSTRATOTYPE-2 OF THE UKUREYSKAYA FORMATION OF THE OLOVSKAYA DEPRESSION, TRANSBAIKALIA)
Authors Sinitsa S.. ,
Reshetova S.. scientific associate, srescht@mail.ru
Vilmova E.. ,
Bibliographic description Sinitsa S., Reshetova S., Vilmova E. Hypostratotypes of the Ukurey Formation of Novoberezovskaya and Olovskaya Depressions of Transbaikalia (Part 2. Hypostratotype-2 of the Ukurey Formation of the Olovskaya Depression in Transbaikalia) // Transbaikal State University Journal, 2017, vol. 23, no. 7, pp. 39—50.
Category Earth science
DOI [56+551.7]:550.8.528
DOI 10.21209/2227-9245-2017-23-7-39-50
Article type
Annotation The hypostratotype-2 of Ukureyskaya Formation, consisting of three subformations, which are blocked by tectonic dislocations, was allocated in the interfluve of Tungusky Olov and Olov, on the left side of Kulinda Fold in Olov Depression. Lower subformation is parted into three members: sandstone-siltstone (ditch 4), tuffaceous- sedimentary (ditch 3(3)) and tuffaceous (ditch 3) which differ in lithological and paleontological composition. In the northwest block the sediments of the latter two members are facial replaced by alteration products of granites, overlie at wind-blown corroded granites of basin basement. Five dinosaur beds with bone remains of limb, pelvic and shoulder girdles, squashed skulls, vertebrae, ribs, thin feather like structures, skin, and scaly tails of the herbivorous Kulindadromeus dinosaur were allocated in the sandstone-siltstone member. Related aquatic fauna is represented by houses of caddisflies, bioclast of tadpole shrimp armors, single conchostracans, ostracods and traces of mud-eaters. The fragments of equisetum columns and their assemblage of rootlets, thallomes of liverworts, capsules of splachnaceae mosses, needles of Czekanowskia, and wing-seeds of conifers were identified among the plant remains. Six dinosaur beds with various bone material, fragments of knobby skin, thin feather like structures with scales, and isolated scaly unites were found in tuffaceous-sedimentary member (ditch 3(3)). Plant remains are the same as in the section of sandstone-siltstone member. Four dinosaur beds with the same bone material and plant remains were identified in the tuffaceous member of ditch 3. There is no fine plumage, knobby skin and scaly tails. The member of brightly colored fine horizontal layered ashstones and «paper» argillites with remains of tadpole shrimps, linceus, insects, traces of mud-eaters and plants were allocated in the central block. The dinosaur remains were not found. The sediments of three subformations characterized by tadpole shrimps, linceus, insects and plants (lower subformation), mass traces of mud-eaters (middle and upper subformation) similar to hypostratotype-1, but free from dinosaur remains are allocated in the southeast block. Late Jurassic age of hypostratotype-2 sediments is determined by the presence of species-indices of Late Unda-Daya complex as tadpole shrimps, conchostracans and insects. Most of the deposits of subformations were accumulated at different depths of volcanic lakes. Alteration products of granites are sediments of temporary streams, which were deposited in the offshore areas of the lake and in its shallow waters
Key words Olov Depression; hypostratotype-2; dinosaurs; tadpole; shrimps (Notostraca); insects; mosses; psephites; granites of the foundation; volcanic lake
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References 1. Vyalov O. S. Dopovidi AN URSR (Dopovidi AN, URSR), 1973, no. 7, pp. 585—588. 2. Vyalov O. S. Geol. zhurn (Geol. journal), 1982, vol. 32, no. 5, pp. 86—89. 3. Gradzinsky R., Kostetskaya A., Radomsky A., Unrug R. Sedimentologiya [Sedimentology]. Moscow: Nedra, 1980. 646 p. 4. Krasilov V. A. Paleoekologiya nazemnyh rasteniy (osnovnye printstipy i metody) [Paleoecology of terrestrial plants (basic principles and methods) ]. Vladivostok: Academy of Sciences of the USSR, 1972. 210 p. 5. Mikulash R., Dronov A. Paleoihnologiya. Vvedenie v izuchenie iskopaemyh sledov zhiznedeyatelnosti [Paleoinology. Introduction to the study of fossil traces of life]. Prague: Geological Institute of the Academy of Sciences of the Czech Republic, 2006. 122 p. 6. Maleev E. F. Vulkanity (spravochnik) [Volcanites (reference book)]. Moscow: Nedra, 1980. 240 p. 7. Oleinikov A. N. Stratigrafiya i fillopody yury i mela Vostochnogo Zabaykaliya [Stratigraphy and Phyllopods of Jurassic and Chalk of the Eastern Transbaikalia]. Moscow: Nedra, 1975, 172 p. 8. Obstanovki osadkonakopleniya i fatsii [Sedimentation and facies]. Moscow: Mir, 1990, vol. 1. 351 p. 9. Sukacheva I. D. Istoricheskoe razvitie otryada rucheynikov [Historical development of the order of caddis flies]. Moscow: Nauka, 1982. 112 p. 10. Stratigraficheskiy kodeks Rossii [Stratigraphic Code of Russia]; Resp. Ed. A. I. Zhamoyda. St. Petersburg: VSEGEI, 2006. 95 p. 11. Tvenhofel V. G. Uchenie ob obrazovanii osadkov [The doctrine of precipitation formation]. Moscow- Leningrad: ONTI NKTP USSR, 1936. 916 p. 12. Yurskie kontinentalnye biotsenozy Yuzhnoy Sibiri i sopredelnyh territoriy [Jurassic continental biocenoses of Southern Siberia and adjacent territories]; Chief ed. A. P. Rasnitsyn. Moscow: Science, 1985, vol. 213. 199 p. 13. Yanin B. T. Osnovy tafonomii [Fundamentals of tafonomy]. Moscow: Nedra, 1983. 184 p. 14. Godefroit P., Sinitsa S. M., Dhouailly D., Bolotsky Y., Sizov A., McNamara M., Benton M., Spagna P. A. Science (Science), 2014, vol. 345, pp. 451—455. 15. Sinitsa S. M. Paleontological Journal (Paleontological Journal), 2016, vol. 50, iss. 12, pp. 1401 — 1411. 16. Bolotsky Y., Sizov A. V., Sinitsa S. M. New data on theropods (Dinosauria: Theropoda) from Transbaikalia [New data on theropods (Dinosauria: Theropoda) from Transbaikalia]: Abstracts. Shenyang, China, 2015, pp. 105-108. 17. Sinitsa S. M., Bolotsky Y., Godefroit P. Taphonomy of the Late Jurassic Kulinda lake [Taphonomy of the Late Jurassic Kulinda lake]: Abstracts. Shenyang, China, 2015, pp. 159-161. 18. Godefroit P., Sinitsa S. M., McNamara M., Cincotta A., Spagna P., Dhouailly D., Bolotsky Y. The primitive ornithischian dinosaur Kulindadromeus from the Jurassic of Siberia and the origin of feathers [The primitive ornithischian dinosaur Kulindadromeus from the Jurassic of Siberia and the origin of feathers]: Abstracts. Shenyang, China, 2015, p. 297.
Full articleHYPOSTRATOTYPES OF THE UKUREYSKAYA FORMATION OF NOVOBEREZOVKA AND OLOVSKAYA DEPRESSIONS OF TRANSBAIKALIA (PART 2. HYPOSTRATOTYPE-2 OF THE UKUREYSKAYA FORMATION OF THE OLOVSKAYA DEPRESSION, TRANSBAIKALIA)