THE DATABASE PALAEOLAKE IN MODERN PALAEOGEOGRAPHICAL STUDIES

125-12

RECONSTRUCTION OF PALEOBASINS OF LARGE LAKE SYSTEMS OF THE SOUTHEASTERN PERIPHERY OF THE CANDINAVIAN ICE SHEET IN THE LATE PLEISTOCENE

11-1

PALEOLIMNOLOGY INVESTIGATIONS OF THE ANZERSKY ISLAND, THE SOLOVETSKY ARCHIPELAGO, THE WHITE SEA

63-6

PALEOLIMNOLOGY OF THE LARGEST EUROPEAN LAKES - LADOGA AND ONEGA

123-12

PALEOGEOGRAPHIC RESEARCHES OF LATE GLACIAL AND EARLY HOLOCENE IN THE NORTHWEST OF THE EAST EUROPEAN PLAIN

114-11

THE FIRST DATED PREGLACIAL DIATOM RECORD IN LAKE LADOGA, NW RUSSIA

65-6

Reconstructions of palaeoecological and palaeoclimatic conditions of Late Pleistocene and Holocene as inferred from sediments of the Lake Medvedevskoe (Karelian Istmus)

The use of chironomids (Diptera: Chironomidae) as indicators of changes in natural and climatic settings allows one to reconstruct paleoclimatic and paleoenvironmental conditions. Based on the results of lithological and chironomid analyses, the loss on ignition (LOI) values, as well as the results of radiocarbon dating (14C AMS), new data on the paleoclimate in the Karelian Isthmus, in particular the quantitative reconstruction of the mean July temperature (TJuly, °C) in the Late Pleistocene and Holocene and the evolution of the ecosystem of Medvedevskoe Lake have been obtained

Reconstruction of palaeoecological and palaeoclimatic conditions of the Holocene in the south of the Taimyr according to an analysis of lake sediments

A sediment core from Khatanga-12 Lake (Taimyr Peninsula, Krasnoyarsk krai) has been studied. The 131.5-cm-long core covers ca. 7100 years of sedimentation. Chironomid analysis, a qualitative reconstruction of the paleoenvironment in the region, and a quantitative reconstruction of variations of the mean July air temperature and in the water depth of the lake have been performed using Northern Russia chironomid-inferred mean July temperature models (Nazarova et al., 2008, 2011, 2015). Khatanga-12 Lake was formed during the Middle Holocene warming as a result of thermokarst processes. The development of the lake ecosystem at different stages of its development was influenced by climatic and cryolithogenic factors. The Middle Holocene warming, which occurred around 7100–6250 cal. years BP, activated thermokarst processes and resulted in the formation of the lake basin. Later, between 6250 and 4500 cal. years BP, a period of cooling took place, as is proved by chironomid analysis. The bottom sediments of the lake during this period were formed by erosion processes on the lake shores. The reconstructed conditions were close to the modern after 2500 cal. years BP

APPLICATION PALEOGEOGRAPHIC DATABASE OF "Q-KOLA" IN THE STUDY OF THE PLEISTOCENE-HOLOCENE BOUNDARY

38-3

STUDY OF PALEOGEOGRAPHIC FEATURES OF THE NORTHERN PART OF THE KARELIAN ISTHMUS DURING THE HOLOCENE

112-11