Description / Table of Contents:
The profound impact of glaciers on the development of the landscape in Norway has become common knowledge among most geologists during the last centuries. For example, the alpine landscape, the U-formed valleys with deep basins and bedrock thresholds, the fjords, the strandflat, the glacially polished and striated rock surfaces, and the various and numerous glacial deposits all bear clear evidence of strong glacier influence. Glaciers have advanced and retreated in Norway and adjacent areas a number of times during the last 2–3 million years, and therefore it is commonly thought that the present-day landscape was formed mainly during this very young period of the geological time scale. There are, however, several preglacial landscape features that are preserved or only slightly changed during these young glaciations. Both types of landscape, i.e., the glacially formed landscape and the preglacial landscape, are presented in the first chapter of this volume. This chapter deals with both the processes and their products in the history of landscape development. Starting with the preglacial development, it continues through the ice ages, and ends with processes and landscape development in the Holocene time period. The second chapter discusses the glacial history of Norway during the Quaternary time period, and describes the glacier variations with advance and retreat of the glaciers and ice sheets. The third chapter presents the record of deposits from the represented stadials, interstadials and interglacials during the last 300,000 years in Norway and adjacent areas, and the suggested correlations between these deposits. The fourth chapter deals with neotectonics in Norway and adjacent areas, which are also largely a result of ice-sheet advance, erosion, sedimentation and retreat. The pressure variations on the ground surface as a result of variable ice weight, glacier erosion and accumulation have led to many earthquakes and large faults, such as the postglacial Stuoragurra fault on Finnmarksvidda. This compilation of the present knowledge of the Quaternary geology of Norway will be of use to several of our fellow colleagues of geology, students, and other dedicated, non-professional readers.
Online-Ressource (173 Seiten)
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