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Kulkova M.,Saint Petersburg State University | Gusentsova T.M.,Western Research Institute | Sapelko T.V.,Russian Academy of Sciences | Nesterov E.M.,Saint Petersburg State University | And 4 more authors.
Journal of Marine Systems | Year: 2014

The article is devoted to the formation of the Neva River in the context of geoarcheological investigations carried out on the archeological site Okhta 1, which is located at the mouth of the Okhta River in the St. Petersburg city region (NW Russia). The site is multilayered and includes cultural layers from the Neolithic, Early Metal Age, Iron Age, and the Landskrona 13th century and Nienschanz 17th century fortresses. The Neva River's formation has long been a controversial question. The transgression of Ladoga Lake around 5950-2950. cal. BP had an effect on the formation of the Neva River. By reviewing the complex investigations of the deposits and artifacts by geological and archeological methods, we may reconstruct the developmental stages of the Litorina Sea Bay and Neva River delta in this area. The formation of delta river sediments occurred from 3589 to 3078. cal. BP. The end of the delta river formation can be associated with the appearance of ancient Early Iron Age people in the region in 2750-2350. cal. BP. © 2013 Elsevier B.V.

Ryabchuk D.,Apkarpinsky Russian Geological Research Institute | Leont'yev I.,RAS Shirshov Institute of Oceanology | Sergeev A.,Apkarpinsky Russian Geological Research Institute | Nesterova E.,Apkarpinsky Russian Geological Research Institute | And 2 more authors.
Baltica | Year: 2011

A study of the southern coastal zone of the eastern Gulf of Finland found sand spits up to 1100 m long and up to 200 m wide, with sand cusps 15 to 100 m wide moving eastward along the shoreline. Similar morphological forms have been described as long-shore sand waves associated with high energy coasts. This article presents the results of field geological and geomorphological studies and retrospective analyses of remote sensing data (air- and satellite photos of on-shore and near-shore parts of the coastal zone). The development of the long-shore sand waves in the study area is explained by the fact that prevailing waves induced by the westerly winds propagate almost parallel to the coast. It is shown that under these conditions the shoreline contours become unstable and any small perturbations to the shoreline extend these contours with time.

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