Heavy and light minerals as a tool for reconstructing depositional environments: an example from the Jałówka site (northern Podlasie region, NE Poland)

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dc.contributor.author Woronko, Barbara
dc.contributor.author Rychel, Joanna
dc.contributor.author Karasiewicz, Mirosław T.
dc.contributor.author Ber, Andrzej
dc.contributor.author Krzywicki, Tomasz
dc.contributor.author Marks, Leszek
dc.contributor.author Pochocka-Szwarc, Katarzyna
dc.date.accessioned 2013-06-06T06:24:26Z
dc.date.available 2013-06-06T06:24:26Z
dc.date.issued 2013
dc.identifier.citation Geologos 19, 1-2, 2013, pp. 47-66
dc.identifier.uri http://repozytorium.umk.pl/handle/item/577
dc.description.abstract Part of northern Podlasie (NE Poland), shaped during the Wartanian stadial of the Odranian glaciation (Saalian), was situated in the periglacial zone during the Vistulian (Weichselian) glaciation. Both landforms and sediments were affected by the periglacial conditions. This is recorded at the Jałówka site, at the floor of a dry valley, where mineral deposits of 4.13 m thick, overlying organic deposits from the Eemian interglacial, were examined. These mineral deposits form four units, from bottom to top: a fluvial unit (I), a loess-like unit (II), a solifluction unit (III), and an aeolian unit with ice wedges (IV) on top of unit III. The heavy and light minerals were analysed, as well as the geochemistry, in order to find out about the parent material and to reconstruct the climatic conditions during deposition. The mineral analysis indicates that the Saalian till was predominantly derived from shallow-marine deposits; erosion accompanied by sorting of the heavy minerals took place on the basis of their mass and grain size. The original material of the till seems therefore to be sedimentary rocks from the eastern Central Baltic Basin. This material became strongly weathered under the periglacial conditions, resulting in the destruction of the quartz grains, as well as in leaching, leading to complete decalcification of the deposits. Aeolian activity resulted in infilling of ice wedges and the creation of thin layers. The intensity and the duration of these processes was limited, so that the effects of the aeolian abrasion are insignificant. Neither resulted the aeolian activity in significant reshaping of the landscape.
dc.language.iso eng
dc.publisher UAM Instytut Geologii
dc.rights info:eu-repo/semantics/openAccess
dc.subject heavy minerals
dc.subject quartz grains
dc.subject periglacial processes
dc.subject source deposits
dc.subject Vistulian glaciation
dc.subject NE Poland
dc.title Heavy and light minerals as a tool for reconstructing depositional environments: an example from the Jałówka site (northern Podlasie region, NE Poland)
dc.type info:eu-repo/semantics/article

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