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TROVANTS OF THE LENA RIVER: HYPOTHESIS AND FORMATION MODEL

G. S. Fedoseev 1, D. Yu. Bolshiyanov 2

1 V.S.Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia; 2 Arctic and Antarctic Research Institute of Russian Federal Service for Hydrometeorology and environmental monitoring, Saint Petersburg, Russia

Unusual nodule formations have long been known in the steep banks of the Lena River and its tributaries. Their belonging to the category of Trovants (trovantogenesis) has been established. It is shown that trovants formation (trovantogenesis) is a process of specific transformation of cemented sands to varying degrees in platform and sub-platform environments. The hypothesis expressed by Romanian geologists about the pseudo-concretionary nature of the trovants has been confirmed. The aqua-dissipative model of their genesis is proposed. The variant of genetic сlassification of small geological bodies wherein trovants are classified as a consistent type is discussed.

Keywords: trovants of the Lena River, sands, pseudoconcretions, step-by-step model, spherical forms, natural monuments.

DOI 10.20403/2078-0575-2021-4-97-112

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