Lithology and late postglacial stratigraphy of bottom sediments in isolated basins of the White Sea coast exemplified by a small lake in the Chupa settlement area (Northern Karelia)

Korsakova, Olga; Kolka, V. V.; Tolstobrova, A. N.; Лаврова, Н. Б.; Tolstobrov, Dmitry; Shelekhova, T. S.

doi:10.1134/s0869593816030035

Cited by 12 publications

(14 citation statements)

References 30 publications

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“…Studies were conducted by a conventional method (Kol'ka et al, 2013) widely used earlier in the study area and adjacent regions (Donner et al, 1977;Kol'ka et al, 2014Kol'ka et al, , 2015aKol'ka et al, ,b, 2018Korsakova et al, 2016;Tolstobrov, 2018). Samples were taken from a paludified floating mat on the northwestern shore of the lake (Figure 4).…”

Section: Field Methodsmentioning

confidence: 99%

Paleogeographic conditions of human habitation on the Karelian coast of the White Sea in the Late-Holocene (Chupa Town, Karelia, Russia)

Тs

et al. 2021

The Holocene

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Bottom sediments from Lake Pervoe Starushechye, on the White Sea shore, near Korabelnaya Bay, Chupa Town, 500 m from an archaeological site, were analyzed. The aim of our studies was to determine the position of the sea shoreline, to correlate archaeological sites relative to it, to date ancient settlements, and to reconstruct the paleoclimatic conditions and habitats of ancient people. Spore and pollen, diatom, and radiocarbon (14C) analyses were done. New evidence for the time of retreat of the seashore, the isolation of Lake Pervoe Starushechye from it and the time of the possible invasion of the area by ancient people was obtained. People were shown to inhabit the area from 3970 ± 120 to 3250 ± 120 14С y.a., when the sea shoreline reached modern levels of 19–22 m. The lake was then a ~8 m deep White Sea bay, in which marine gyttja was deposited. These events are reflected in the stratigraphy of the sequence and supported by the results of diatom and spore and pollen analyses. About 3500 y.a., mean annual temperatures in North Karelia were 2°С and annual precipitation ~50 mm/year higher than modern values. Spruce and pine-spruce forests with aspen and alder patches grew on the shore. A favorable climate and exuberant vegetation attracted people. Therefore, it is at the Atlantic-Subboreal boundary that the archaeological sites located at the above altitudes could arise. The lake separated from the White Sea 3020 ± 90 14С y.a. Freshwater sapropel was deposited in the isolated lake, as indicated by the composition of diatom flora and spore and pollen spectra. The sea shoreline declined to 17–16 m. Light-coniferous pine lichen-green moss forests with light-loving oligotrophic grasses were spreading actively throughout the study area.

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Section: Field Methodsmentioning

confidence: 99%

Paleogeographic conditions of human habitation on the Karelian coast of the White Sea in the Late-Holocene (Chupa Town, Karelia, Russia)

Тs

et al. 2021

The Holocene

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“…2004; Korsakova et al . 2016). This provides information about the timing of deglaciation of the Imandra region and thus suggests that the history reflected by core Co1410 starts only a few centuries after deglaciation of the site.…”

Section: Climatic and Environmental Historymentioning

confidence: 99%

“…2006; Korsakova et al . 2016). Even less than 30 km southwest of site Co1410 diatom analyses suggest a marine ingression during Lateglacial times (Tolstobrova et al .…”

Section: Climatic and Environmental Historymentioning

confidence: 99%

Lateglacial and Holocene environmental history of the central Kola region, northwestern Russia revealed by a sediment succession from Lake Imandra

Lenz

Savelieva

Frolova

et al. 2020

Boreas

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Bolshaya Imandra, the northern sub‐basin of Lake Imandra, was investigated by a hydro‐acoustic survey followed by sediment coring down to the acoustic basement. The sediment record was analysed by a combined physical, biogeochemical, sedimentological, granulometrical and micropalaeontological approach to reconstruct the regional climatic and environmental history. Chronological control was obtained by 14C dating, 137Cs, and Hg markers as well as pollen stratigraphy and revealed that the sediment succession offers the first continuous record spanning the Lateglacial and Holocene for this lake. Following the deglaciation prior to c. 13 200 cal. a BP, the lake's sub‐basin initially was occupied by a glacifluvial river system, before a proglacial lake with glaciolacustrine sedimentation established. Rather mild climate, a sparse vegetation cover and successive retreat of the Scandinavian Ice Sheet (SIS) from the lake catchment characterized the Bølling/Allerød interstadial, lasting until 12 710 cal. a BP. During the subsequent Younger Dryas chronozone, until 11 550 cal. a BP, climate cooling led to a decrease in vegetation cover and a re‐advance of the SIS. The SIS disappeared from the catchment at the Holocene transition, but small glaciers persisted in the mountains at the eastern lake shore. During the Early Holocene, until 8400 cal. a BP, sedimentation changed from glaciolacustrine to lacustrine and rising temperatures caused the spread of thermophilous vegetation. The Middle Holocene, until 3700 cal. a BP, comprises the regional Holocene Thermal Maximum (8000–4600 cal. a BP) with relatively stable temperatures, denser vegetation cover and absence of mountain glaciers. Reoccurrence of mountain glaciers during the Late Holocene, until 30 cal. a BP, presumably results from a slight cooling and increased humidity. Since c. 30 cal. a BP Lake Imandra has been strongly influenced by human impact, originating in industrial and mining activities. Our results are in overall agreement with vegetation and climate reconstructions in the Kola region.

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“…Then, during the process of glacial isostatic uplift, land areas gradually protruded above sea level, passed the island stage and joined the mainland only at ~1000 cal. yr. BP (Kolka et al, 2015; Korsakova et al, 2016). This ongoing process can be an important non-typical factor in the formation and dynamics of peatland ecosystems.…”

Section: Introductionmentioning

confidence: 99%

A multi-proxy reconstruction of peatland development and regional vegetation changes in subarctic NE Fennoscandia (the Republic of Karelia, Russia) during the Holocene

et al. 2021

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A better understanding of past long-term environmental changes in the subarctic region is crucial for mitigation of the possible negative effects of climate warming in this vulnerable region. This study provides a new multi-proxy reconstruction of regional vegetation changes and peatland development for north-eastern Fennoscandia (Russia) during most of the Holocene. To that purpose, we performed plant macrofossil, pollen, testate amoebae, peat humification, loss on ignition and radiocarbon analyses of the peat deposits from a mire around Vodoprovodnoe Lake (the Kindo Peninsula, the Republic of Karelia). Our data indicate that the peat deposits started accumulating before 9147 ± 182 cal. yr. BP. The vegetation cover in the area was mainly typical for the northern taiga zone, except for the period ~7800–5600 cal. yr. BP, when it generally resembled the middle taiga zone. The vegetation cover and peatland were greatly affected by reoccurring fires, which can be partly related to human activity. These events were associated with an increased proportion of birch in the vegetation cover (as a pioneer species) and/or water level decreases. By 600 cal. yr. BP, the peatland and the surrounding vegetation reached its current state and only minor changes had been recorded since that time. Overall, our results suggest a considerable and unexpected role of fires in the postglacial dynamics of subarctic peatlands.

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Lithology and late postglacial stratigraphy of bottom sediments in isolated basins of the White Sea coast exemplified by a small lake in the Chupa settlement area (Northern Karelia)

Cited by 12 publications

References 30 publications

Paleogeographic conditions of human habitation on the Karelian coast of the White Sea in the Late-Holocene (Chupa Town, Karelia, Russia)

Paleogeographic conditions of human habitation on the Karelian coast of the White Sea in the Late-Holocene (Chupa Town, Karelia, Russia)

Lateglacial and Holocene environmental history of the central Kola region, northwestern Russia revealed by a sediment succession from Lake Imandra

A multi-proxy reconstruction of peatland development and regional vegetation changes in subarctic NE Fennoscandia (the Republic of Karelia, Russia) during the Holocene

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