Sökning: "Radiocarbon dating"
Visar resultat 21 - 25 av 46 avhandlingar innehållade orden Radiocarbon dating.
21. Transport, degradation and burial of organic matter released from permafrost to the East Siberian Arctic Shelf
Sammanfattning : Permafrost soils in the Arctic store large quantities of organic matter, roughly twice the amount of carbon that was present in the atmosphere before the industrial revolution. This freeze-locked carbon pool is susceptible to thawing caused by amplified global warming at high latitudes. LÄS MER
22. The Church of Yimrhane Kristos : An Archaeological Investigation
Sammanfattning : The purpose of this thesis is to augment our understanding of the Church of Yimrhane Kristos, and the Lasta period in which it was built, from the study of a variety of source materials. Due to the fact that the Lasta period suffers from the absence of adequate and reliable literary sources, this study largely depends on the elements of historic buildings as the basic data source. LÄS MER
23. Islands tidiga bosättning : studier med utgångspunkt i merovingertida-vikingatida gårdslämningar i Herjólfsdalur, Vestmannaeyjar, Island
Sammanfattning : The date for the beginning of colonization of Iceland by settlers from Norway has generally been set at 872-874 A.D. Excavations at Herjólfsdalur on the Westman Islands, however, have shown that Norse settlement first occurred considerably earlier or in the Merovingian Period in the 7th century. LÄS MER
24. Constraining the Southern Part of the Greenland Ice Sheet since the Last Glacial Maximum from Relative Sea-Level Changes, Cosmogenic Dates and Glacial-Isostatic Adjustment Models
Sammanfattning : New results are presented from the investigation of relative sea-level changes in the Nanortalik and Qaqortoq-Narsarsuaq areas in SW Greenland from c. 11 000 cal. years BP to the present. LÄS MER
25. Large carnivore population turnover and ecological change during the Late Quaternary
Sammanfattning : The cave lion (Panthera spelaea), the grey wolf (Canis lupus) and the brown bear (Ursus arctos) all shared an intercontinental distribution across the northern hemisphere during most of the Late Quaternary, and experienced repeated events of climate change. The cave lion went extinct at the end of the Pleistocene and although the wolf and the bear have survived until present day, recent human persecution has caused demographic bottlenecks and local extinctions. LÄS MER