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GEOARCHAEOLOGY OF THE EARLY MEDIEVAL STRONGHOLD SURROUNDINGS IN GRZYBOWO NEAR WRZEŚNIA, GREATER POLAND

100%
Marcinkowski M., Szczepaniak M.
Quaestiones Geographicae
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2019
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vol. 38
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issue 3
95-108
EN
The stronghold in Grzybowo (Rabieżyce village) near Września is a remnant of medieval ring-fort. It is investigated to a considerably lower degree than similar objects from Greater Poland. The analysis of archival data shows that the stronghold is located on the edge of the flood plain of the Struga River formed by Holocene sediments, cutting into the moraine plateau. Analysis of sediments in the stronghold vicinity revealed interlayers of organic matter and sandy deposits rich in calcium carbonate with variable grain size composition, particularly west of the stronghold (i.e. in the valley floor). Moreover, radiocarbon data set showed a considerably older than Holocene age of the sediment. The analysis of the course of the contemporary river channel also allowed for stating hypotheses regarding a potentially different course of the former Struga River channel and its changes during the development of the stronghold. These assumptions were based on the analysis of the archaeological archival data, where field drawings suggest the existence of such a channel in the territory of the stronghold.
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Cechy litologiczne wypełnień wybranych zagłębień bezodpływowych obszaru Wysoczyzny Łódzkiej

72%
Forysiak J., Majecka A., Marks L., Tołoczko-Pasek A., Okupny D.
Acta Geographica Lodziensia
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2017
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vol. 106
195-210
PL
Małe zagłębienia bezodpływowe są powszechnym elementem rzeźby terenu środkowej Polski. Ich powstanie wiąże się głównie z procesami glacjalnymi, rzecznymi czy eolicznymi, ale większość form położonych w obszarach wysoczyznowych jest wynikiem wytapiania brył martwego lodu w fazie recesji lądolodu stadiału warty (zlodowacenia odry). Prace badawcze prowadzone były na Wysoczyźnie Łódzkiej, w czterech stanowiskach z zespołami zagłębień. Miały na celu porównanie cech litologicznych wypełnień. Badania osadów pozwoliły na wyróżnienie czterech zespołów litologicznych i ukazanie zróżnicowania wypełnień badanych zbiorników. Część zagłębień nie zawierała osadów biogenicznych interglacjału eemskiego czy wczesnego vistulianu. Wskazuje to na zróżnicowanie lokalnych warunków geologicznych i odmienny przebieg zapełniania zbiorników.
EN
Small closed depressions are a common feature of the landscape of Central Poland. Their origin has been connected to various morphogenetic processes but most of the forms located in upland areas are the result of the melting of buried ice in the recession phase of the ice sheet of the Warta Stadial. A study of four sites with clusters of depressions, is being carried out in the Łódź Upland to compare the lithological features of their infillings. The analyses of the sediments have allowed to distinguish four lithological units and to display the variation between the infillings of the studied basins. Some of the depressions do not contain biogenic sediments of the Eemian Interglacial or the Early Vistulian. It indicates the presence of differences in the local geological conditions and a different course of the process of filling in of the basins.
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