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This study investigates the age and origin of leaf wax n-alkanes from a fluvial sediment–paleosol sequence (FSPS) by compound-class 14C dating. Our results show varying age offsets between the formation and sedimentation of leaf wax n-alkanes from well-developed (paleo)soils and fluvial sediments that are mostly due to their complex origin in such sequences. Thus, dating the leaf wax n-alkanes is an important step for more robust leaf-wax-based paleoenvironmental reconstructions in FSPSs.
HESS | Articles | Volume 24, issue 4
Hydrol. Earth Syst. Sci., 24, 2105–2120, 2020
https://doi.org/10.5194/hess-24-2105-2020
Hydrol. Earth Syst. Sci., 24, 2105–2120, 2020
https://doi.org/10.5194/hess-24-2105-2020

Research article 28 Apr 2020

Research article | 28 Apr 2020

Age and origin of leaf wax n-alkanes in fluvial sediment–paleosol sequences and implications for paleoenvironmental reconstructions

Marcel Bliedtner et al.

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Cited articles

Adamia, S., Alania, V., Chabukiani, A., Chichua, G., Enukidze, O., and Sadradze, N.: Evolution of the Late Cenozoic basins of Georgia (SW Caucasus): A review, Geol. Soc. Lond. Spec. Publ., 340, 239–259, https://doi.org/10.1144/SP340.11, 2010. 
Akhundov, T.: South Caucasus in the Neolithic and early Bronze Age: The question of epochs and periods, in: A view from the highlands: Archaeological studies in honour of Charles Burney, edited by: Sagona, A., Ancient Near Eastern studies Supplement, 12, Peeters, Herent, 421–436, 2004. 
Blair, N. E. and Aller, R. C.: The fate of terrestrial organic carbon in the marine environment, Annu. Rev. Mar. Sci., 4, 401–423, https://doi.org/10.1146/annurev-marine-120709-142717, 2012. 
Bliedtner, M., Zech, R., Kühn, P., Schneider, B., Zielhofer, C., and von Suchodoletz, H.: The potential of leaf wax biomarkers from fluvial soil-sediment sequences for paleovegetation reconstructions – Upper Alazani River, central southern Greater Caucasus (Georgia), Quaternary Sci. Rev., 196, 62–79, https://doi.org/10.1016/j.quascirev.2018.07.029, 2018a. 
Bliedtner, M., Schäfer, I. K., Zech, R., and von Suchodoletz, H.: Leaf wax n-alkanes in modern plants and topsoils from eastern Georgia (Caucasus) – implications for reconstructing regional paleovegetation, Biogeosciences, 15, 3927–3936, https://doi.org/10.5194/bg-15-3927-2018, 2018b. 
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Short summary
This study investigates the age and origin of leaf wax n-alkanes from a fluvial sediment–paleosol sequence (FSPS) by compound-class 14C dating. Our results show varying age offsets between the formation and sedimentation of leaf wax n-alkanes from well-developed (paleo)soils and fluvial sediments that are mostly due to their complex origin in such sequences. Thus, dating the leaf wax n-alkanes is an important step for more robust leaf-wax-based paleoenvironmental reconstructions in FSPSs.
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