Sökning: "Kvartärgeologi"
Visar resultat 31 - 35 av 157 avhandlingar innehållade ordet Kvartärgeologi.
31. Lokka och Porttipahta dämningsmagasin. Väntade följder av en planerad överdämning av torvmark
Sammanfattning : (Slutord)Denna utredning har avsett att visa, att även en överdämning av torvmark med den stora utbredning av denna som förekommer i de norra delarna av Finland och Sverige så småningom medför en förbättring av vattenförhållandena nedströms magasinen. Man kunde förvänta sig diverse svårigheter och försämringar till följd av de särpräglade drag som utmärker den organiska jordarten, men det har visat sig att den i stora drag följer schemat för oorganiskt material. LÄS MER
32. Environmental history in southern Mozambique : Reconstruction of flooding events, hydroclimate and sea-level dynamics since mid-Holocene
Sammanfattning : The aim of this thesis has been to reconstruct paleoenvironment, paleohydrology and paleoclimate in coastal southern Mozambique, with emphasis on tracing past flooding events on the lower Limpopo River floodplain. In order to extend flood chronologies beyond periods covered by instrumental data, sediments from lakes on the floodplain were studied (Lake Lungué, Coassane Oxbow, Lake Magandane and Lake Soane). LÄS MER
33. Late Cenozoic Geoarchives from Lake Baikal, Siberia
Sammanfattning : Three long sediment cores (BDP-98 – 600 m, BDP-96 – 200 m and BDP-93 – 100 m) drilled in Lake Baikal (Siberia) have been studied with the aims of establishing an absolute chronology and reconstructing paleoclimatic and paleoenvironmental changes in the region. The location of the lake at relatively high latitude and continental interior and a thick continuous sedimentary archive that developed in a rift system tectonic setting provide unique material for this investigation. LÄS MER
34. Quaternary paleoceanography of the Arctic Ocean : A study of sediment stratigraphy and physical properties
Sammanfattning : A Quaternary perspective on the paleoceanographic evolution of the central Arctic Ocean has been obtained in this PhD thesis by studying sediment cores from all of the Arctic’s major submarine ridges and plateaus. The included cores were mainly recovered during the Healy-Oden Trans-Arctic expedition in 2005 and the Lomonosov Ridge off Greenland expedition in 2007. LÄS MER
35. Diatom and Sedimentological Investigations on West Antarctic Shelf Sediment
Sammanfattning : Climate and environmental change following the retreat of the last glacial ice sheet in the Antarctic Peninsula has been interpreted, employing diatom abundance, relative abundance of Chaetoceros resting spores and diatom assemblages as proxies. These together with sedimentological data and radiocarbon dating, suggest four major events that can be further subdivided. LÄS MER
