D. Wolf et al. 
Villarubia section soil coarse silt content (%) sand content (%) organic carbonate 
texture (9%) (63-20um) fs ms content (%) content (96) 
\ 20 40 60 80 100 nn 30701502025 04 | _0 X 9 Mn 
Su 
108 
PEedogenic = 
total = Fe{dVFe(t} 
‘ran (g/kg} 
105 MO ® A547 0.35 NS 
KO 
..— p 
a) 
aA: 
‚>. 
x 
y=3 
Li 
RB. 
m 
Clay Sir 
© dissolved during 
QvypSsum aliminaltion 
PS 
[20-200 um / <20 um} 
= 
=> 
a | 
is: ine sand (200-63um} 
MS: medium sand 
:830-200um) 
'otal conlent 
Xarse sill-sized 
arbanahs ccnleank 
Figure 7. (color online) Stratigraphic sequence and analytical data of the Villarubia section (40°01’42.2”N, 03°25’30.3”W; 607 m asl), show- 
ing sediment units (SU), sampling points, palaeo surfaces (PS), and grain-size parameters (soil texture %, coarse silt content % sand content 
%), organic content, carbonate content (total and coarse silt-sized fractions), and ratio between pedogenic and total iron as a weathering index. 
For legend, please see Figure 2. 
Villarubia 
Particle fining due to increasing 
transport distance 
33 m 
7 * Daraler 
A: 11.7 % 
mean grain-size: 37.7 um 
30 m 
Sn 
Din 
—_ 
— 
Z—- 
= 
zu 
7 
„ 
\ . . 
= \ 1 1 
Tagus River tt 
3m_ 
10m 
100 m 
; . Fuendiduefia _—" 8: 12.4% 
zz. A3 - mean grain-size: 41,8 um 
SS: 18.1 % 
mean grain-size:; 49.5 um 
778: 24.1 % 
mean grain-size: 75.8 um 
1 ı 
SU-3 camnosed of Auvisl/ alluvial deposits 
350 m 
14.000 m 
1.200 m 
Figure 8. (color online) Schematic sketch showing topographic positions of individual loess sections with respect to vertical (blue arrows) and 
2orizontal (dark grey arrows) distances from the river floodplain/braid plain as dominant sediment source. Higher aeolian transport distances 
are accompanied by gradual sediment fining (decreasing % fS and mean grain-size) due to particle size-sorting (after Wolf et al., 2019). Sim- 
plified figure; loess sections are not on a single transect. For actual section positions, please see Fig. 1. fS = fine sand 
carbon and shows higher values of magnetic susceptibility. 
All of this evidence suggests that SU-10 consists of slope 
deposits derived from the erosion of soil horizons in the sur- 
rounding area. 
Micromorphological observations 
Except for deposition phases, phases of surface stability 
reveal paleoenvironmental information, e.g., by means of 
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attns’/Aanana cambridaoe araf/carefterms https‘ //idal ara/10 1017 /ı1a 20720 11