| Article |
|---|
| Article name |
Lithological and paleontological climate indicators in the mesozoic of Transbaikalia |
| Authors |
Sinitsa S.. , Vilmova E.. , Vasilenko E.. graduate student, engineer, mr.evgeniy.vasilenko@gmail.com |
| Bibliographic description |
|
| Category |
Earth science |
| DOI |
551.582:551.76/571.55 |
| DOI |
10.21209/2227-9245-2020-26-1-60-67 |
| Article type |
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| Annotation |
The object-matter of the article is indicators of various climatic zones of Transbaikalia. The subject of the article is to define the structure, dominants of the climatic regions. The purpose of the article is to summarize climate materials to highlight humid, subtropical and arid regions in Transbaikalia.
Climatic indicators of by-gone geological times are the mineralogical and lithological features of rocks, morphological features of fauna and flora. Plant remains, marine and freshwater mollusks are mainly used for paleoreconstructions of climates of the past. Humid, subtropical and arid climatic regions are identified in the Mesozoic of Transbaikalia. The humid region is characterized by a predominance of moisture, wide expansion of clay formation and vegetation. The subtropical region is characterized by alternation of rainy and dry seasons and decrease in clay accumulation. High content of plant remains is the feature of the region. The arid region is characterized by poor vegetation; decay oozes with the remains of temporary inhabitants accumulate in the lakes. Triassic humid, Jurassic humid, subtropical, Jurassic-Cretaceous humid, subtropical and arid climates are first identified for Transbaikalia.
Clay rocks, соncretions, mollusks with a thin-walled shell and calamite forests are indicators of the humid climate in the Triassic of Transbaikalia.
Mollusks with a thin-walled shell are represented in the seas of the Jurassic and Jurassic-Cretaceous humid and subtropical regions. Czekanowskia, coniferous-ginkgo and cycadophytes-coniferous-ginkgo forests grew on land. Aridization of climate and the origin of wide shallow lakes, where placing of bituminous clay takes place, are recorded in the Jurassic-Cretaceous time in the region |
| Key words |
Transbaikalia; Triassic, Jurassic, Cretaceous, humid climate, subtropical climate, arid climate, Czekanowskia, coniferous-ginkgo forest, cycadophytes-coniferous-ginkgo forest, coniferous forest |
| Article information |
Sinitsa S., Vasilenko E., Vilmova E. Lithological and paleontological climate indicators in the mesozoic of Transbaikalia // Transbaikal State University Journal, 2020, vol. 26, no. 1, pp. 60–67. DOI: 10.21209/2227-9245-2020-26-1-60-67. |
| References |
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