Roberts, H.M.; Bryant, C.L.; Huws, D.G. & Lamb, H. (2018): <b>Generating long chronologies for lacustrine sediments usingluminescence dating: a 250,000 year record from Lake Tana, Ethiopia</b>. <i>Quaternary Science Reviews</i> <b>202</b>, 66-77.
Resource Description
Title:
Generating long chronologies for lacustrine sediments usingluminescence dating: a 250,000 year record from Lake Tana, Ethiopia
FOR816dw ID:
123
Publication Date:
2018-10-31
License and Usage Rights:
Resource Owner(s):
Individual:
Helen M. Roberts
Contact:
email:
luise.wraase <at> geo.uni-marburg.de
Individual:
Charlotte L. Bryant
Contact:
email:
luise.wraase <at> geo.uni-marburg.de
Individual:
Dei G. Huws
Contact:
email:
luise.wraase <at> geo.uni-marburg.de
Individual:
Henry Lamb
Contact:
email:
ulrike.selig <at> geo.uni-marburg.de
Abstract:
The lakes of the eastern Africa Rift often contain great thicknesses of sediment that may provide<br/>
continuous records of environmental change over decadal to million-year timescales. However interpretation<br/>
of these changes is greatly compromised without a reliable chronology. Luminescence dating<br/>
has not been used extensively in lacustrine settings; instead previous studies have often relied upon<br/>
radiocarbon dating, using extrapolation beyond the upper limit of that technique, and employing<br/>
opportunistic sampling of tephra and palaeomagnetic signatures where possible. This study from Lake<br/>
Tana, Ethiopia, demonstrates that recent advances in luminescence methodology can provide long<br/>
chronologies for lake sediments that are not dependent on the intermittent presence of dateable material,<br/>
as is the case for radiocarbon and tephra-based methods. Specifically, this study generates luminescence<br/>
ages that agree with independent chronology based on radiocarbon dating in the upper part of<br/>
the core, and extends significantly beyond the range of radiocarbon dating to provide one of the longest<br/>
independently dated lacustrine sediment records in eastern Africa, thus demonstrating the tremendous<br/>
potential of luminescence for constructing lacustrine sediment chronologies over 100,000 year<br/>
timescales.
