Relict coastal forms on the bottom of Lake Ladoga and their connection with Holocene regressions

Aksenov А.О.^1,2,3, Rybalko А.Е.^2,4, Fedorov G.B.⁵,Sergeev А.Yu.¹, Moskovtsev А.А.¹

RELICT COASTAL FORMS ON THE BOTTOM OF LAKE LADOGA AND THEIR CONNECTION WITH HOLOCENE REGRESSIONS

Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. Issue 10.

Download *pdf

doi: 10.24412/2687-1092-2023-10-314-317

¹ A.P. Karpinsky Russian Geological Research Institute, St. Petersburg, Russia

² Saint-Petersburg State University, St. Petersburg, Russia

³ Arctic and Antarctic Research Institute, St. Petersburg, Russia

⁴ VNIIOkeangeologia, St. Petersburg, Russia

⁵ A.L. Takhtajyan Institute of Botany NAS RA, Yerevan, Armenia

Abstract. This study is dedicated to the analysis of seismic acoustic data for the purpose of reconstructing the positions of Lake Ladoga shorelines during periods when its level was lower than present. Within the scope of this work, archive data from echo-sounding and modern materials of acoustic profiling have been used. Landforms that mark the position of the shoreline at various depths, such as coastal ridges, bars, terraces, and river deltas, have been identified. Paleoshorelines at depths of 12-15 m and 20 m have been reliably established. It is hypothesized that the maximum regression of the lake reached depths of 35-40 m, which is indicated by erosional truncations on the surface of glacial lacustrine sediments and buried erosional incisions made in glacial lacustrine deposits.

Keywords: Lake Ladoga, the Holocene, water-level fluctuations, acoustic profiling, coastal forms

REFERENCES:

Abramova S.A., Davydova N.N., Kvasov D.D. History of Lake Ladoga in the Holocene according to spore-pollen and diatom analyses. History of Lakes of the North-West. Leningrad: Nauka, 1967. pp. 113–132.

Kvasov D.D., Martinson G.G., Raukas A.V. History of Ladoga, Onega, Pskov-Chudskoye lakes, Baikal and Khanka. Leningrad: Nauka, 1990. 280 p.

Shitov M.V. Holocene transgressions of Lake Ladoga. Abstract of thesis. ... candidate of geological and mineralogical sciences: 25.00.01. St. Petersburg State University. Saint Petersburg. 2007. 16 p.

Delusina I., Donner J. Additional evidence of the Holocene transgression in Lake Ladoga on the basis of an investigation of the beach deposits on the island Mantsinsaari // Bulletin of the Geological Society of Finland. 1995. Vol. 67. No. 2. P. 39–50. doi: 10.17741/bgsf/67.2.003

Lebas E., Gromig R., Krastel S., Wagner B., Fedorov G., Görz C., Averes T., Subetto D., Naumenko M., Melles M. Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia – Evidence from Lake Ladoga // Quaternary Science Reviews. 2021. Vol. 251. P. 106637. doi: 10.1016/j.quascirev.2020.106637

Subetto D.A., Davydova N.N., Rybalko A.E. Contribution to the lithostratigraphy and history of Lake Ladoga // Palaeogeography, Palaeoclimatology, Palaeoecology. 1998. Vol. 140. Is. 1-4. P. 113–119. doi: 10.1016/S0031-0182(98)00032-7

Cite this article:

Aksenov А.О., Rybalko А.Е., Fedorov G.B., Sergeev А.Yu., Moskovtsev А.А. Relict coastal forms on the bottom of Lake Ladoga and their connection with Holocene regressions // Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. 2023. Issue 10. P. 314-317. doi: 10.24412/2687-1092-2023-10-314-317