Towards improved empirical isobase models of Holocene land uplift for mainland Scotland, UK
| Autor: | Robin A. Cullingford, Peter T. Fretwell, Callum R. Firth, David E. Smith |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
010506 paleontology
Geologic Sediments General Mathematics Oceans and Seas Normal Distribution General Physics and Astronomy 010502 geochemistry & geophysics 01 natural sciences law.invention Altitude law Trend surface analysis Ice Cover Seawater 14. Life underwater Radiocarbon dating Holocene 0105 earth and related environmental sciences Shore geography geography.geographical_feature_category Geography General Engineering Age Factors Estuary Models Theoretical Oceanography Scotland Sidereal time Mainland Physical geography Geology |
| Zdroj: | Philosophical transactions. Series A, Mathematical, physical, and engineering sciences. 364(1841) |
| ISSN: | 1364-503X |
| Popis: | A new approach to modelling patterns of glacio-isostatic land uplift during the Holocene in mainland Scotland, UK, is described. The approach is based upon altitude measurements at the inner margin or locally highest point of raised estuarine surfaces dated by radiocarbon assay supported by microfossil analyses. 2241 altitudes have been analysed by a technique new to studies of former sea-levels, Gaussian Trend Surface Analysis, and isobase models for four Holocene shorelines: the Holocene Storegga Slide tsunami shoreline, abandoned rapidlycirca7900 sidereal years BP; the Main Postglacial shoreline, abandoned duringcirca6400–7700 sidereal years BP; the Blairdrummond shoreline, abandoned duringcirca4500–5800 sidereal years BP, and a speculative fourth shoreline, the Wigtown shoreline, abandoned duringcirca1520–3700 sidereal years BP, are shown in a series of maps. The implications of the shoreline patterns for glaicio-isostasy in the area are discussed. It is maintained that the statistical technique used enables broad estimates to be made of nearshore sea surface change. |
| Databáze: | OpenAIRE |
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