QUATERNARY LACUSTRINE MORPHOLITHOGENESIS AND DEVELOPMENT OF HYDROLACCOLITES (SOUTHERN TRANSBAIKALIA)
https://doi.org/10.7868/S0435428118010042
Abstract
Formation of some lake basins in the Southeastern Transbaikalia origins from surface subsidence due to the Pleistocene thermokarstic processes. The mechanism of such development is illustrated by the results of geological studies of a palaeolake basin in the Urtui coal field. Deep (down to 300 m) freezing of the ground affected water-abundant coal beds and led to the formation of ice diapirs (hydro-laccolites) that pierced upwards and burst on the surface as ice hills (pingos) at deep erosion cuts above the frozen coal layers. A set of data (bedding deformations in sections of lacustrine deposits, radiocarbon dates from bone and plant macrofossil material, carpological and palynological analyses, determination of fossil insects and molluscan shells) testify on cyclic formation of the lake basin with the impulses of development during the cold epochs (MIS6, 4 and 2). The palaeolake demonstrated the tendency for gradual shallowing and widening.
About the Author
F. I. Enikeev
Institute of Natural Resources, Ecology and Cryology, Siberian Branch of the RAS
Russian Federation
Russian Federation
Chita
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Review
For citations:
Enikeev F.I. QUATERNARY LACUSTRINE MORPHOLITHOGENESIS AND DEVELOPMENT OF HYDROLACCOLITES (SOUTHERN TRANSBAIKALIA). Geomorfologiya. 2018;(1):45-53. (In Russ.) https://doi.org/10.7868/S0435428118010042
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