Temporal variation of prehistoric human settlement recorded in the oxbow lake deposits of San river (Sandomierz Basin, SE Poland)

Abstract

This study presents the sedimentological and pollen analysis, and radiocarbon dating of the palaeochannel fill deposits situated on the wide alluvial ridge on which 131 archaeological sites were discovered. The analyzed territory covers the right bank of the San river valley (in the area of the Leszno profile) with an area of 72.5 km2. Increase of fine-grain sand sediments, and the presence of redeposited fragments of clayey silts (soil aggregates) correlates well with the increase man’s activity in the 2nd and the 1st half of the 1 st millennia BC (the decline of the Mierzanowice culture, the Trzciniec culture, the Tarnobrzeg Lusatian culture) as well as in the 1st millennium AD (the Przeworsk culture and the early Medieval settlement) and with transformation of plant communities recorded in the palynological sequence. The layer of sediments at the depth of 85–69 cm with the highest proportion of the finest clay fraction may indicate the reduction of cultivation or abandonment of arable land (the pre-Roman (La Tène) period).

Evolution of the Holocene alluvial fan of the River Stryi in the foreland of the Eastern Carpathians (Western Ukraine)

“…The flood phase of 2800-2400 BP is recorded, for example, in the palaeomeander systems of the Vistula , and in the subfossil trunks falling in the Dniester river valley (Gębica & Krąpiec, unpublished materials). In the lower San river valley near Stubno, the increase in the input of sands to the small-radius Subboreal palaeomeander was dated to between 2850 and 2310 BP (Gębica et al, 2019). The silty-clay sediments dated to 2360 BP in the ŻM 7 palaeochannel sequence were probably deposited far away from the active river channel during the declining wet phase (2800-2400 BP).…”