Osl age dating
It is concluded that sediment deposition was mainly forced by sediment supply from ploughing areas.
Two short-lived phases of incision during the first half of the XIX century were probably caused by a decrease of sediment supply due to a decline in the frequency of heavy precipitation events.
The typical turn-round time for providing a date is circa 3-4 months, although, rapid dating (circa 4-6 weeks or sometimes less, depending on machine time and sample type) using our fast track service can be undertaken.
OSL dating results including Dose equivalent (De) estimate, dose rate measurement and calculated age will be reported as a short pdf document by email.
Il apparaît que l’aggradation est principalement liée à la forte fourniture sédimentaire issue des labours.
Deux brèves phases d’incision durant la première moitié du XIX siècle semblent liées à une baisse de la fourniture sédimentaire due à une diminution de la fréquence de précipitations intenses.
The channel incised during this period was later partly filled with sediment.
The decline of agricultural land use from about 1915 onwards decreased sediment supply, while the increase of urbanisation from about 1950 amplified the flow energy of flooding by pluvial waters and overflows from storm basins, causing the presently ongoing incision in the area that began about AD 1975.
disturbing the land surface by ploughing) or settlements (i.e. When a drainage system changes from stable conditions to either an erosional or depositional mode, this is often of major importance for local communities (e.g., due to the loss of fertile soil).
Luminescence dating is particularly appropriate when radiocarbon dating is not possible (either where no suitable material is available or for ages beyond the radiocarbon age limit) or for applications affected by radiocarbon plateau effects (e.g.
post 1700 AD, early Iron Age contexts, late glacial timescales) and when the relationship between the organic materials and the archaeological context is uncertain.
Two approaches result in OSL ages that are internally consistent and in excellent agreement with radiocarbon dating, indicating that all investigated sediments are younger than AD 1500.
From this data a complex deposition and incision history is constructed for the last 500 years.
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., 2004; Leopold & Völkel, 2007; Fuchs & Buerkert, 2008).