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Geological mapping works, conducted on 1:50,000 litho-petrographic map sheets of the South Baltic coast and the eastern part of the Pomerania Lakeland, show a clear relationship between large landforms of this area, like: subglacial channels, Wieżyca Hill, the ice lobe that accumulated Gardno moraine deposits, and sub-Quaternary relief. These landforms came into existence as a result of reactivation of pre-existing fault zones in the sub-Cainozoic basement, due to the ice mass loading during successive Pleistocene ice-sheet advances. Subglacial channels developed and thick tills and ice-dammed lake deposits were accumulated in the region. The subglacial channels and morainic belts are now dominating landforms in the Pomeranian Lakeland.
The current paper presents investigation of the response of silver firs growing near Kartuzy in the Kaszubskie Lakeland (northern Poland) to climate conditions. Tree-ring width series covering the period of 1914-2006 were built and correlated with mean monthly temperature and precipitation. Dependence of the growth of analysed firs on winter, early spring and summer temperature was observed. Significant relation to moisture availability was detected only for January. Analysis of pointer years revealed similar driving forces that were obtained by correlation and response function investigation. Reaction of firs from the Kaszubskie Lakeland to the extreme climate conditions is analogous to the exhibited at other sites of this species localised outside distribution range. Investigated silver firs seem to have found favourable growth conditions in the studied area and further cultivation of that species in northern Poland may turn to be successful.
Annually laminated lake sediments are a very valuable source of paleoecological information because they provide a precise timescale in calendar years and limited post-depositional disturbances. They are formed in specific conditions that enable not only the formation but also preservation of lamination, hence they rarely occur. The goal was to find lakes with annually laminated sediments in Kashubian Lakeland which can provide new high-resolution paleoenvironmental and paleoclimatic data for this part of Europe. Based on statistical analyses including catchment geology and topography, morphometric lake basin features and hydrological parameters, a pre-selection of 22 lakes with water depths ranging from 15 to 35 m was carried out. Gravity cores (30–90 cm long) were obtained from 18 of these lakes during a field survey in 2006. The cores were split lengthwise, photographed digitally and examined carefully. Four of the lakes studied show distinct alternations of pale and dark laminae. For three lakes (Kramsko Duże, Kramsko Małe and BorowoWielkie) such laminations were restricted to sections of the cores only. Lake Suminko was deemed the most promising site with its laminations covering the entire taken core. In all the cases, biochemical varves were developed with pale spring/summer layers composed of autochthonous carbonates and dark fall/winter layers made of organic detritus and minerogenic particles.
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