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.

分析了位于白海岸、Chupa 镇 Korabelnaya 湾附近、距考古遗址 500 m 的 Pervoe Starushechye 湖的底部沉积物。我们研究的目的是确定海岸线的位置，确定与之相关的考古遗址，确定古代定居点的年代，并重建古气候条件和古代人的栖息地。进行了孢子和花粉、硅藻和放射性碳（¹⁴ C）分析。获得了关于海岸撤退时间、Pervoe Starushechye 湖与它的隔离以及古代人可能入侵该地区的时间的新证据。人们被证明居住在从 3970 ± 120 到 3250 ± 120  ^{14 的区域}С ya，当海岸线达到 19-22 m 的现代水平时。该湖当时是一个约 8 m 深的白海海湾，其中沉积了海洋 gyttja。这些事件反映在序列的地层学中，并得到硅藻、孢子和花粉分析结果的支持。大约 3500 年，北卡累利阿的年平均气温为 2°С，年降水量比现代值高约 50 毫米/年。海岸上生长着带有白杨和桤木斑块的云杉和松云杉林。宜人的气候和茂盛的植被吸引了人们。因此，位于上述海拔高度的考古遗址可能出现在大西洋-亚北部边界。与白海分离的湖泊 3020 ± 90  ¹⁴С ya 淡水腐泥沉积在孤立的湖中，如硅藻菌群的组成以及孢子和花粉光谱所示。海岸线下降到17-16 m。具有喜光贫营养草的轻针叶松地衣-绿色苔藓林在整个研究区积极蔓延。