In:
E&G Quaternary Science Journal, Copernicus GmbH, Vol. 70, No. 1 ( 2021-02-08), p. 53-71
Kurzfassung:
Abstract. Loess-paleosol sequences (LPSs) are essential records for reconstructing Quaternary paleoenvironments. No previous study has provided
numerical chronologies of loess in Lower Franconia, southern Germany; their
chronostratigraphic assumptions have relied mainly on German
(pedo)stratigraphic schemes. In this study, we provide for the first time a
chronology for LPSs in Lower Franconia based on optically stimulated
luminescence (OSL) dating using quartz and a comparison of K-feldspar
(63–100 µm) and the polymineral fraction (4–11 µm). Our results show that all obtained ages are in stratigraphic order, ranging from
Holocene to late Pleistocene, and in general confirm the former
stratigraphical interpretations. A good agreement of the obtained ages is
observed between both feldspar grain size fractions; they also agree well
with the quartz OSL ages up to ∼50 ka. However, a marked
difference between the growth pattern of the dose response curves and
consequently different saturation characteristics of fine and coarse grains
is found. Even though in our samples the discrepancy in ages is not very
significant, we suggest the use of coarse-grained K-feldspar whenever
possible in order to not be confronted with unknowns such as the mineral
composition of the polymineral fraction.
Materialart:
Online-Ressource
ISSN:
2199-9090
DOI:
10.5194/egqsj-70-53-2021
DOI:
10.5194/egqsj-70-53-2021-supplement
Sprache:
Englisch
Verlag:
Copernicus GmbH
Publikationsdatum:
2021
ZDB Id:
2572732-1
