| Article |
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| Article name |
Jurassic Paleoecosystems of Kulinda Herbivorous Ornithischian Dinosaurs’ Locality (Olovskaya Formation, Transbaikalia) |
| Authors |
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| Bibliographic description |
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| Category |
Earth science |
| DOI |
[56+551.7]:550.8.528 |
| DOI |
10.21209/2227-9245-2018-24-5-21-35 |
| Article type |
Scientific |
| Annotation |
The intermountain Olovskaya Depression of Transbaikalia is composed of Jurassic sediments of the Olovskaya and Ukureyskaya Formations. The Olovskaya Formation is divided into two subformations, the Ukureyskaya Formation – into three ones. The lithological (abiotic) and paleontological (biotic) components of the formations made it possible to distinguish them as paleomacroecosystems. The subformations are referred to paleomesoecosystems; the members and the series – to paleomicroecosystems; the beds and the facies – to paleonanoecosystems. All the subdivisions listed are established for the sections of both formations of herbivorous ornithischian dinosaurs’ locality in Kulinda small river valley. Olovskaya paleomacroecosystem consists of two paleomesoecosystems (lower and upper subformations) which include paleomicroecosystems of red-colored psephites of fans (abiotic component). The biotic component is represented by pollen and spores with dominance of conifers’ pollen. The Ukureyskaya paleomacroecosystem consists of three paleomesoecosystems (lower, middle and upper subformations) with paleomicroecosystems and paleonanoecosystems. The Lower Ukureyskaya paleomesoecosystem is composed of three paleomicroecosystems: the landscape of temporary streams’ fans; lake landscape with terrigenous and tuffaceous sediments of the temporary lake; beaches’ landscape with offshore-lacustrine psephite-sandy deposits. Paleomicroecosystems of fans’ landscape consist of paleonanoecosystems of channels’ deposits and temporary puddles. Horsetail thickets are referred to the biotic factor of this paleonanoecosystem. The paleonanoecosystems of lake landscape are represented by the sediments of littoral and limnic zones (psammites, silts and ashstones), the biotic component of which is established in the form of attached and planktonic algae, invertebrate aquatic fauna of crustaceans, insects, and mud-eater worms. Covers of sandstones and chlidolites with rare lenses of carbon-bearing siltstones are referred to the abiotic factor of the paleonanoecosystems of “bare” beach, dissociated marsh areas, and places with horsetails’ thickets. The biotic factor is represented by the producers – marsh Czekanowskia forest with the undergrowth of mosses, horsetails, ferns and with the terrestrial community of consumers in the form of herbivorous ornithischian dinosaurs, amphibians, single predatory dinosaurs, lizards and insects. The decomposers are splachnaceae mosses that inhabit the corpses of dinosaurs or rotting algae. The Middle Ukureyskaya paleomesoecosystem consists of an abiotic factor in the form of tuffaceous sandstones, tuff-siltstones, rare ashstones and poor biotic factor in the form of horsetails, single insects and mud-eater worms. The abiotic factor of the Upper Ukureyskaya paleomezoecosystem is represented by siltstones and mudstones with thin beds of sandstones. Mainly mud-eater worms, liverworts and conifers’ wing-seeds are in the composition of the biotic factor |
| Key words |
Olovskaya Depression; Olovskaya Formation; Ukureyskaya Formation; subformations; series; members; beds; facies; paleomacroecosystems; paleomesoecosystems; paleomicroecosystems; paleonanoecosystems |
| Article information |
Sinitsa S. Jurassic Paleoecosystems of Kulinda Herbivorous Ornithischian Dinosaurs’ Locality (Olovskaya Formation, Transbaikalia) // Transbaikal State University Journal, 2018, vol. 24, no. 5, pp. 21-35 |
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