Geological setting and sedimentary characteristics of the coversands distributed in the western part of the Blonie glaciolacustrine basin (Central Poland) - Preliminary results

Abstract

The coversands distributed in the Blonie glaciolacustrine basin, west of Warsaw (Central Poland) were investigated. Textural features including grain size, rounding and frosting of quartz grains and mineralogical-petrographic composition in the sandy fractions (0.5-0.8 and 0.8-1.0 mm) were examined and the types, dynamics, regime and variation in processes during the formation of the coversands were determined. The sands are characterized by the prevalence of quartz and lack of micaceous minerals. Moreover, the relatively high content of partially rounded, matt (EM/RM) and well-rounded (RM) quartz grains, typical of aeolian sedimentary conditions, was certified. Hence, the results show a high aeolization degree of the investigated sediments, thus correlating them with aeolian deposition in dry, periglacial conditions after drying up of the Warsaw icedammed lake.

The fan-like forms in the southern margin of the Mazovian Lowland area (Central Poland): a new high-resolution textural-timing study

“…Very few grains showed the cracked outline within the investigated sediments, thus supporting the aeolian setting with the minor transformation by cryoturbation processes. Similar pattern has been also observed in the aeolian deposits in the Central Poland (Kalińska 2012;Kalińska and Nartišs 2014).…”

STOP 13: Inland dune field near Daugavpils, East-Latvian Lowland

“…Up to 34% of these have been noted at the Gijantari site, which is rather unique for an aeolian setting. However, a similar outline has been noted within the aeolian sand-sheets in Central Poland (Kalińska 2012) and the aeolian complexes in Ukraine (Zieliński et al 2009). Postsedimentary frost weathering is responsible for a high content of cracked (C) quartz grains 79 (Woronko and Hoch 2011); up to 32% of such grains have been observed.…”

Upper Pleistocene palaeoenvironmental changes at the Zwierzyniec site, central Poland

“…2). A sim i lar sandy layer cov ers the B³onie level, west of War saw (Kaliñska, 2012). The varved clays of the War saw ice-dammed lake, as es tab lished by Halicki (1933), oc cur also north of Warsaw in the Zakroczym area, as well as in Piaseczno and Go³ków, south of War saw (Fig.…”

“…The flu vial or i gin of the sands was proposed by Sarnacka (1982), and Baraniecka and Konecka-Betley (1987). How ever, west of War saw at the Plecewice site, the ae olian char ac ter of sed i ments pre vails (Kaliñska, 2012). Ad dition ally, sandy ae olian-like de po si tion took place at 15-16 ka and 12 ka only 15 km SE of the Zwierzyniec site (Kaliñska-Nartiša and Nartišs, 2016b).…”