At that time it was thought that the yel- lowish brown silt-rich sediment was of fluvial origin being deposited by the large rivers. (1834): Observations on the loamy deposits called "loess" of the ba- sin of the Rhine. (this issue): Loess-Palaeosol-Sequences from the loess area of Saxony (Germany). Based on these standards, the accuracy and preci- sion of the analysis were within 1% for major elements and within 5% for trace elements. (2007a): Dating of Interglacial Depos- its by Luminescence Methods. (Eds.): The Climate of Past Interglacials, Elsevier: 157-172. The p IRIR 225 does not show evidence of field saturation (equilibrium between the accumulation of new charge and the loss by anomalous fading), and in- creases with depth.
In this study, very detailed maps of loess prop- erty patterns including loess thickness, granulometry and stratigraphy were collected from publications and historical- ly maps published between 18 resulting in more than 600 loess locations providing the base information for the area under study. B0.1.00 /©Authors/ Creative Commons Attribution License present a new composite profile including new stratigraph- ic marker horizons and palaeosols. Age estimates of 98 ± 15 ka and 117 ± 18 ka were calculated for these samples. Our interpretation is hence based on the fading corrected p IRIR 225 age estimates (Fig. Sample Wei7, which was taken from the calcareous loess covering E&G/Vol. The humic-rich horizon is covered by a solifluction layer of reworked humic-rich mate- rial including loess loam and calcareous loess (Sample Wei5 was taken from this horizon, 5 in Fig. This layer yielded an age estimate of 202 ± 14 ka and is covered by about 50 cm thick reworked loess (Wei4) with macroscopically visible pseudomicelium, which gives an age estimate of 203 ± 22 ka.The term"L6B" was first described in Central Europe by Karl Casar von Leonhard (1823/24) who reported yel- lowish brown, silty deposits along the Rhine valley near Heidelberg. From 133 cm upwards the stagnic Luvi- sol is overlain by a (sandy) loess colluvium showing weak cambic properties (Tab. The organic content assessed ranges from weak to very weak humic. 1982) and organic nitrogen using the Kjeldahl procedure. (2007b): Lumineszenzdatierungen an limnischen Sedimenten von Klinge/Kreis Forst. The D e -s calculated using the p IRIR 225 from feldspar range from 64.9 ± 2.3 Gy to 921 ± 41 Gy.Charles Lyell (1834) brought this term into widespread usage by observing similarities between loess and loess derivatives along the loess bluffs in the Rhine and Mississippi. The profile Kartof- felfeld is vertically subdivided (IUSS 2006) into the horizons Ap-Bwl-Bw2-Bw3-2Btb/Bgbl-2Bwbl/Bgbl-3Bwb2/Bgb2/C (Fig. By applying the German soil classification system (KA5 2005) the sequence of horizons can be described as Ap (0-30 cm) /M (30-54 cm) /M (54-82 cm) /M (82-110 cm) / Swd-Bt (110-133 cm) /Swd-Bv (133-138 cm) /Swd-Bv (138- E&G/Vol. Major (Al, Fe, and Mn) and trace (S, Cr, Cu, Pb, Zn, Co, Ni, Cd, Sr, Hg, V) elements were determined using an X-ray fluores- cence (XRF) spectrometer (Spectro Xepos-Benchtop-Roent- genfluoreszenz-Spektrometer) equipped with a Rh tube (Chen et al. Quality control of the analytical proce- dure was established using three internationally recognized standard reference materials (SRMs) viz., ISE, BCSS-1, and MESS-1. The D e values are in average -20% higher than those obtained using the IR 50 .More recently luminescence dating has also become a robust dating technique for penul- timate and antepenultimate glacial loess (e.g. Furthermore, the numeri- cal dating provides the basis for quantitative loess research applying more sophisticated methods to determine and un- derstand high-resolution proxy data, such as the palaeodust content of the atmosphere, variations of the atmospheric cir- culation patterns and wind systems, palaeoprecipitation and palaeotemperature. Fi- nally, a study from a nearby East Eifel crater fill (Schmidt et al, 2011) showed that the pulsed p IRIR 150 from loess deposits in this area is in fact well bleached. The IR 50 is most likely in field saturation for sample Wei7.
The papers of this Special Issue on Loess in Europe give the basis for substantial further challenging developments in loess research and are summarised geographically from north to south. Their luminescence age estimates are in good agreement with stratigraphic evidence and with independent age control provided by 40 Ar/ 39 Ar dat- ing of intercalated air-fall tephra and scoria. The p IRIR 225 age estimate for sample Wei7 (350 ka) can be regarded as minimum age only, as the D e value of 921 ± 4l Gy is in the range of 2D . 6: Fadingraten fur das IR 50 und das p IRIR 225 Signal fur alle Proben. Die Fehlerbalken stellen den 1-sigma Standardfehler dar. 2) yielded an age estimate of 350 ka indicating loess deposition during marine Isotope Stage (MIS) 10 or earlier and suggesting that terrace t4 has a minimum deposition age of -350 ka.
See full list and special prices of available numbers on page 207. (1990): Loess is not just the accumulation of dust. Sandlbssgebiete sind durch Kreuzschraffur markiert. 1 = Niederrhein; 2 = Recklinghausen; 3,4 = Soester Borde; 5 = Milnster; 6 = Ber- senbriick; 7 = Damme; 8 = Wehden; 9 = Wunstorf, Rehurg; 10 = Goldenstedt; 11 = Syke; 12 = Apensen; 13 = Harburg; 14 = Garlsdorf; 15 = Uelzen, Bevensen; 16 = Clenze; 17 = Bergen, Jettebruch; 18 = Wittingen; 19 = Klotze; 20 = Peine, Braunschweig; 21 = Helmstedt; 22 = Haldensleben; 23 = Magdeburg E&G/Vol. The prevailing soil types in the floodplains are Gley- sols developed on alluvial deposits and Histosols that are mainly used as pasture, and stagnic Luvisols that are wide- spread at higher elevations and support arable agriculture (Fig. The upper layers/horizons of the soils in both topo- graphic positions are characterized by colluvial cover de- posits. 4a and b) confirming the results of Buylaert et al. Recycling ratios for the samples range from 0.98 ± 0.03 to 1.01 ± 0.003 for the IR 50 and from 0.91 ± 0.04 to 0.99 ± 0.003 for the p IRIR 225 . To test the applicability of the post-IR IRSL protocol using a stimulation temperature of 225°C, the dose recovery ratio was measured for all samples (Murray & Wintle, 2003). B£ Weil Wei2 Wei3 We H Wei S Wei6 Wei7 Sample ID Fig.5: Dose recovery test (a) and the residual doses (b)for the IR 50 and the p IRIR 225 signal for all samples. If the SAR protocol is suitable, the meas- ured to given dose ratio should be close to 1. 5a shows the results of the dose recovery test for all samples for the IR 50 and the p IRIR 225 .