Аннотация:In 2022, the Markul expedition conducted geoarchaeological research on the northwest coast of the Caucasus. The research led to the discovery of a system of adjacent and overlapping Holocene marine terraces that had not previously been identified. Soil samples cannot be precisely dated. Therefore, relative dating methods are used. Three main periods were identified in this study: the conditions of geological rock formation, spore dust analysis, and the magnitude of the known transgressive-regressive oscillations of the world ocean. By comparing these data with previous research conducted at Pitsunda Cape and Sukhumi Bay, a relation table can be constructed. The study found similar geological processes in terrace deposits in a place of our research and in Pitsunda Bay. In this case, it is the process of a sea lagoon gradually becoming shallower and eventually becoming inundated. This is due to the cessation of water inflow from the sea. These geological processes are fully correlated with paleoclimate data from spore dust analyses. The importance of this process in our study stems from the fact that the flooding of the lagoons caused the seaports to cease operations. This disruption not only altered trade routes but also had a broader impact on settlement patterns.