Nemuno ledynmečio periglacialinės nuosėdos šiaurės vakarinėje Lietuvos dalyje

• Main Author: Kondratienė, Ona
• Format: Article in Journal/Newspaper
• Language: Lithuanian; English
• Published: 1998
• Subjects: Nemunas Glaciation; Periglacial sediments; Glacioaquatic; Glaciolacustric sediments; Palynology; Paleogeography; Pollen; Arctic; l Pollen; Betula nana; Subarctic
• Online Access: http://lmavb.lvb.lt/LMAVB:ELABAPDB5839845&prefLang=en_US

The pollen of the tree group amounts to 40%. Among those dominating are Pinus (40-58%) and Betula (24-36%) while rather a lot of Betula nana L. pollen were found (Fig. 2). Estimating the pollen spectra by distribution of individual groups of plants, by frequency and by the species composition of grasses, we could suppose that the sediments under study were being formed under the conditions of a cold subarctic and arctic climate. The local flora was rather poor: grasses were associating with Salix and Betula nana. The climate growing colder, the flora wilted completely. This can be proved by absence of organic matter and pollen in the upper part of the sediments as well as by their textural characteristics. Taking into account the palynological, lithological and other geological data, we could assume that the Nemunas Glaciation sediments could have started forming not earlier than 32,000-30,000 years ago, while Lithuania was covered with the glacier some 25,000-20,000 years later.