Evolution of Lake Ladoga as recorded in litho- and biostratigraphy of a small coastal lake
DOI:
https://doi.org/10.31951/2658-3518-2024-A-4-384Keywords:
lake sediments, diatoms, chrysophyte cysts, organic matter content, Holocene, lake-level changes, Baltic Ice LakeAbstract
The study is focused on the litho- and biostratigraphic record of Lake Lavijarvi, presently a small lake in the closest vicinity from the Ladoga coast, and formerly a sheltered bay of Lake Ladoga. Several stages of its evolution were revealed that are characterized with different organic matter content in the sediments, diatom assemblages composition and abundances of siliceous microalgae remains. It has been demonstrated that at the earlier stages, the environments in the basin of Lake Lavijarvi were similar to those in Lake Ladoga. Later in the Holocene, local factors became more pronounced, and the conditions different from those in the open-water part of Lake Ladoga established in the basin of Lake Lavijarvi. The regression of Lake Ladoga resulted in the isolation of Lake Lavijarvi and the beginning of its small-lake stage after ca. 3900 cal. BP.
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This work is distributed under the Creative Commons Attribution-NonCommercial 4.0 International License.