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Figure 1.
Study area (A) on Polish Uplands (according to Richling et al. 2021) and study sites location (B) within OPID area (according to Bielenin 1992; dashed line)
Source: after P. Przepióra & P. Kusztal
Figure 2.
Iron microspherule separated from alluvia (photo P. Przepióra 2019)
Figure 3.
Location of study profiles (A) on the DEM (geoportal.gov.pl) and results of grain size analysis, Folk-Ward’s (1957) grain size parameters and microspherule concentration (B)
Source: by K. Fularczyk
Figure 4.
ZSK1 profile location on the actual Suchedniów Reservoir bottom (Google Maps 2023) with historical borders of previous ponds (A), view of the outcrop (photo P. Przepióra 2017) with distinguished members and their age (B), grain size, Folk-Ward’s (1957) grain size parameters, geochemical measurements and microspherule concentration in deposits (C)
source: by P. Przepióra
Figure 5.
Study profiles and A–A’ section across the Sielpia Reservoir bottom location (Google Maps 2023) (A), lithology and microspherule concentration in the deposits (B)
source: by P. Przepióra