THE NATURAL AND ANTHROPOGENIC EVOLUTION OF THE BIEBŁA RIVER VALLEY AND THE RECORD OF ENVIRONMENTAL CHANGES IN ITS ALLUVIA - PRELIMINARY RESULTS

2021 ◽  
Vol 8 (1) ◽  
pp. 35-39
Author(s):  
Krzysztof Żurek ◽  
Tomasz Kalicki ◽  
Fularczyk Karolina ◽  
Paweł Przepióra ◽  
Piotr Kusztal
Keyword(s):  
Environmental Changes ◽  
River Valley ◽  
Preliminary Results ◽  
Anthropogenic Evolution

scholarly journals Optical dating and sedimentary record from the terrace depositional profile of the Warta River (Central Poland)

2014 ◽  
Vol 41 (4) ◽  
pp. 361-368 ◽  
Author(s):  
Danuta Dzieduszyńska ◽  
Joanna Petera-Zganiacz ◽  
Juliusz Twardy ◽  
Piotr Kittel ◽  
Piotr Moska ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Late Glacial ◽  
River Valley ◽  
Osl Dating ◽  
Flood Events ◽  
Alluvial Terrace ◽  
Sedimentary Record ◽  
Optical Dating ◽  
Central Poland ◽  
Stable Conditions

AbstractResults of OSL dating and sedimentary studies from the profile of the low alluvial terrace of the middle Warta River are presented. The samples were dated using the single-aliquot regenera-tive method. Dating was used to establish a timing of the Weichselian Late Glacial events in the river valley environment. Stable conditions on the floodplain are expressed by the deposition of organic-rich series radiocarbon dated at 12 900-12 600 cal BP and 11 600-10 770 cal BP. Samples for OSL dating were collected from the mineral material deposited during the intensification of flood events during the Weichselian decline. The results obtained for the alluvia range from 12.78 ± 0.62 ka b2k to 14.33 ± 0.74 ka b2k. Sedimentological criteria allowed to distinguish between particular flood events. Overestimation of OSL ages is probably a result of rapidity of environmental changes in that time.

APPLICATIONS OF PIXE ANALYSIS TO STUDIES IN CELL BIOLOGY

1992 ◽  
Vol 02 (03) ◽  
pp. 417-420 ◽  
Author(s):  
SHINJI MATSUMOTO ◽  
MASAKO FURUSE ◽  
KENSUKE KITAO ◽  
TOYOYUKI ISHIHARA ◽  
KUNIHIRO SHIMA ◽  
...  
Keyword(s):  
Cell Biology ◽  
Mammalian Cells ◽  
Environmental Changes ◽  
Molecular Level ◽  
Pixe Analysis ◽  
X Ray ◽  
Preliminary Results ◽  
Linear Relationships ◽  
Element Contents

PIXE application to the measurement of cellular elements is outlined on characteristic variations of the contents of yeast, CHO, V79 and MM46 cultured mammalian cells according to environmental changes. Cellular elements from P to Br were successfully analyzed at these cells after cautious preparation of samples in filtration steps with as possible as less deterioration. We confirmed linear relationships between the X-ray yields and these element contents. The experiment was extended to an analysis of cellular substances at molecular level by scanning of specimens. Preliminary results were included.

Mercury, PM2.5 and gaseous co-pollutants in the Ohio River Valley region: Preliminary results from the Athens supersite

2006 ◽  
Vol 40 (34) ◽  
pp. 6650-6665 ◽  
Author(s):  
Reddy L.N. Yatavelli ◽  
Jason K. Fahrni ◽  
Myoungwoo Kim ◽  
Kevin C. Crist ◽  
Christopher D. Vickers ◽  
...  
Keyword(s):  
River Valley ◽  
Ohio River ◽  
Ohio River Valley ◽  
Preliminary Results

Integrating U-Th, 14C, and 210Pb methods to produce a chronologically reliable isotope record for the Belize River Valley Maya from a low-uranium stalagmite

The Holocene ◽  
2019 ◽  
Vol 29 (7) ◽  
pp. 1234-1248 ◽  
Author(s):  
Pete D Akers ◽  
George A Brook ◽  
L Bruce Railsback ◽  
Alex Cherkinksy ◽  
Fuyuan Liang ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Scientific Discovery ◽  
River Valley ◽  
Spatiotemporal Variability ◽  
Combining Evidence ◽  
Belize River Valley ◽  
Early Postclassic ◽  
Isotope Record ◽  
The Relationship ◽  
Insight Into

Social and environmental changes had great spatiotemporal variability in the Maya Lowlands during the Classic and Postclassic Periods, and stalagmites promise high-resolution paleoclimate data that can refine our understanding of this complex time. Unfortunately, stalagmites in this region are often difficult to date by U-Th methods because of low initial uranium concentrations. Other dating techniques can be used on such stalagmites, and we present here an age–depth model for BZBT1, a low-uranium stalagmite sampled from Box Tunich cave in the Belize River Valley. This age–depth model dates the growth of BZBT1 to between 400 and 1610 yr BP (340–1550 CE) by combining evidence from U-Th results, radiocarbon dating of both stalagmite CaCO3 and trapped organic material, and 210Pb dating. The resulting stable isotope record from BZBT1 reveals paleoclimate changes that affected local Maya populations during the Classic and early Postclassic Periods. This record is further refined by isotopically tuning the BZBT1 data with two other regional stalagmite records. Our work offers additional paleoclimate insight into the relationship between the Maya and their environment from a stalagmite that would typically be disregarded for research purposes. Continued research into alternative dating techniques for speleothems can enable additional scientific discovery while promoting speleothem conservation.

scholarly journals Records on Anthropogenic Environmental Changes in Small River Valleys in the Vicinity of Łowicz (Central Poland): Their Significance for the Reconstruction of Late Holocene Settlement Tendencies

2011 ◽  
Vol 4 (1) ◽  
pp. 7-20
Author(s):  
Jacek Forysiak ◽  
Milena Obremska ◽  
Juliusz Twardy
Keyword(s):  
Human Activity ◽  
Late Holocene ◽  
Environmental Changes ◽  
River Valley ◽  
Small River ◽  
Central Poland ◽  
Gradual Introduction ◽  
Organic Deposits ◽  
River Valleys

Abstract Based on palaeobotanical analyses of organic deposits, as well as geomorphological and geological studies at four sites in various geomorphological locations in relation to tributaries of the Bzura River, the presence of traces of human activity, its intensiveness, and classification to cultural levels were analysed. A pattern of later and later settlement in areas remote from the axis of the Warsaw-Berlin streamway was observed along with the gradual introduction of settlement from river valley bottoms to watershed zones.

Hexactinellid sponge assemblages across the Campanian– Maastrichtian boundary in the Middle Vistula River section, central Poland

2012 ◽  
Vol 62 (4) ◽  
pp. 561-580 ◽  
Author(s):  
Ewa Świerczewska-Gładysz
Keyword(s):  
Sea Level ◽  
Environmental Changes ◽  
River Valley ◽  
River Section ◽  
Sea Level Changes ◽  
Central Poland ◽  
Vistula River ◽  
Hexactinellid Sponge ◽  
Hexactinellid Sponges ◽  
Upper Campanian

ABSTRACTŚwierczewska-Gładysz, E. 2012. Hexactinellid sponge assemblages across the Campanian-Maastrichtian boundary in the Middle Vistula River section, central Poland. Acta Geologica Polonica, 62 (4), 561-580. Warszawa.The sponge fauna from the Upper Campanian-lowermost Maastrichtian succession of the Middle Vistula River valley (central Poland) is represented mainly by dictyid hexactinellid sponges (Hexactinosida and Lychniscosida). Their greatest abundance and taxonomic variability is noted in the “Inoceramus” inkermanensis Zone (Upper Campanian), and they are less diverse in the overlying (Upper Campanian) Trochoceramus costaecus Zone and lower “Inoceramus” redbirdensis Zone. In the upper “Inoceramus” redbirdensis Zone (basal Maastrichtian in the sense of the Tercis rather than the Boreal definition) they are extremely rare. With the beginning of the Maastrichtian the number of dictyid sponges gradually increases.The observed changes in the abundance and taxonomic variability of the dictyid sponges indicate environmental changes in the latest Campanian-earliest Maastrichtian sea in the area. It seems that changes in basin bathymetry, confined to eustatic sea-level changes in the latest Campanian and early Maastrichtian, were the most important factor. Progressive shallowing of the basin in the latest Campanian drastically restricted the development of dictyids. In the peak regression, the sea level could have fallen to only several tens of metres. The gradual recovery of the sponge assemblages correlates with subsequent deepening of the basin with the start of the Maastrichtian

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