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Fig 1.
(A) – Loess distribution in SW Poland (modified after Jary, 2010); (B) – location of the Zaprężyn LPS.
Fig 2.
Pedosedimentary sequence and description of the basic units in Zaprężyn LPS. Radiocarbon dating after Jary (2007). Stratigraphic interpretations after Jary et al. (2016) using labelling system after Marković et al. (2015).
Fig 3.
LPS from Zaprężyn: (A) – Whole Zaprężyn profile; (B) – modern soil; (C) – top of L1LL1 loess unit; (D) – unconformity; (E) – L1LL2 loess with deformed gley horizons; (F) – S1 soil and the bottom part of L1LL2 loess unit in Zaprężyn LPS.
Fig 4.
Relative probability density functions for equivalent dose distribution for all investigated OSL samples. Relative probability density functions according to Berger (2010).
Fig 5.
Lithology, fraction percentages, grain-size parameters and stratigraphic units (acc. Marković et al. (2015) in the Zaprężyn LPS).
Fig 6.
The new 14C and OSL ages obtained in Gliwice laboratory, OSL ages published by Zöller et al. (2022) and revised stratigraphical interpretation of the Zaprężyn LPS.
Fig 7.
Results of OSL dating of the ice wedge pseudomorph in Zaprężyn LPS: red dot - Zöller et al. (2022) result; black dots – Moska OSL results.
Basic information about investigated samples.
Lab. code
Sample ID
Samplin depth (cm)
Dose rate (Gy/ka)
Equivalent dose (Gy)
Overdispersion (%)
OSL age (ka)
GdTL-3709
ZAPR_1
690
1.24 ± 0.05
175 ± 4
5
141.5 ± 7.0
GdTL-3710
ZAPR_2
645
1.73 ± 0.06
182 ± 4
5
105.1 ± 4.3
GdTL-3711
ZAPR_3
615
2.27 ± 0.08
170 ± 4
5
75.0 ± 3.1
GdTL-3712
ZAPR_4
590
3.03 ± 0.11
190 ± 4
5
62.6 ± 2.8
GdTL-3713
ZAPR_5
550
2.99 ± 0.10
176 ± 4
5
59.0 ± 2.8
GdTL-3714
ZAPR_6
505
3.00 ± 0.10
177 ± 5
5
59.0 ± 2.8
GdTL-3715
ZAPR_7
490
3.06 ± 0.10
164 ± 4
5
53.8 ± 2.5
GdTL-3716
ZAPR_8
480
3.14 ± 0.10
172 ± 5
7
54.8 ± 2.8
GdTL-3717
ZAPR_9
450
2.87 ± 0.11
161 ± 4
5
56.0 ± 2.8
GdTL-3718
ZAPR_10
410
3.01 ± 011
163 ± 4
5
54.0 ± 2.5
GdTL-3719
ZAPR_11
370
3.09 ± 0.11
163 ± 4
5
52.7 ± 2.5
GdTL-3720
ZAPR_12
330
2.86 ± 0.10
156 ± 6
9
54.4 ± 3.0
GdTL-3721
ZAPR_13
270
2.81 ± 0.10
51.8 ± 1.5
7
19.3 ± 1.0
GdTL-3722
ZAPR_14
210
2.72 ± 0.10
49.9 ± 1.5
8
19.2 ± 1.1
GdTL-3723
ZAPR_15
110
2.48 ± 0.10
38.1 ± 0.8
5
15.3 ± 0.7
GdTL-3724
ZAPR_16
50
3.09 ± 0.11
42.6 ± 1.0
5
14.5 ± 0.7
GdTL-3725
ZAPR_17
550
2.99 ± 0.10
162 ± 6
14
56.7 ± 3.0
GdTL-3726
ZAPR_18
460
3.10 ± 0.11
154 ± 6
13
52.0 ± 3.0
GdTL-3727
ZAPR_19
450
2.75 ± 0.10
129 ± 4
11
49.7 ± 3.0
GdTL-3728
ZAPR_20
340
2.88 ± 0.10
150 ± 5
10
54.8 ± 3.0
14C ages of gley horizons in Zaprężyn LPS.
No.
Lab. No.
Sample name
Age 14C (BP)
Range of calendar (calibrated) age 68.3% confidence level
Range of calendar (calibrated) age 95.4% confidence level