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001-es BibID:BIBFORM104080
035-os BibID:(WoS)000504752800034 (Scopus)85077342799
Első szerző:Buró Botond (geográfus)
Cím:New Radiocarbon Data from the Paleosols of the Nyírség blown Sand Area, Hungary / Botond Buró, József Lóki, Erika Győri, Richárd Nagy, Mihály Molnár, Gábor Négyesi
Dátum:2019
ISSN:0033-8222
Megjegyzések:Despite many ideas about the age and processes of sand movements and paleosol formation, there are still some uncertainties in this relations in the Nyirseg, eastern Hungary. The major aim of the present study was to clarify the chronology of fossil soils and blown-sand layers in the sand dunes of the Nyirseg using radiocarbon (C-14) dating on soil and charcoal samples. Charcoal and soil samples were collected from buried paleosols from different sand quarries for C-14 dating. The bulk organic carbon content of the buried soil and charcoal pieces recovered from buried fossil soil layers allowed parallel C-14 accelerator mass spectrometry dating in several cases. The new C-14 results indicate paleosol development during Younger Dryas, while the preceding interstadial was assumed as a cold and dry period when only sand movement occurred in the area. Our results also confirm and support the previous assumptions, that in the Late Glacial, the first paleosol development period was during the BOlling-AllerOd Interstadial. Four soil-forming periods could be determined during the Holocene (Preboreal, Boreal, Atlantic, Subatlantic). We have also indirectly identified sand movements during the Oldest Dryas, Younger Dryas, Preboreal, Boreal, and Subatlantic phase in the study area.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
aeolian activity
Holocene
Late Glacial
paleosol
radiocarbon dating
Megjelenés:Radiocarbon. - 61 : 6 (2019), p. 1983-1995. -
További szerzők:Lóki József (1946-) (geográfus) Győri Erika Nagy Richárd (1983-) (geográfus) Molnár Mihály Négyesi Gábor (1980-) (geográfus)
Pályázati támogatás:GINOP-2.3.2-15-2016- 00009
GINOP
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001-es BibID:BIBFORM076379
Első szerző:Buró Botond (geográfus)
Cím:Investigation of the periods of sand movement with different dating methods in the Nyírség, Hungary / Buró Botond, Lóki József, Sipos György, Négyesi Gábor, Andrási Bence, Jakab Attila, Félegyházi Enikő, Molnár Mihály
Dátum:2018
Megjegyzések:The Nyírség is the second largest sand dune area in the northeastern part of the Carpathian Basin. The Nyírség have been studying for over 100 years but geological and geomorphological research can still contribute to the understanding of the surface development of the area. In the Carpathian Basin the Nyírség is the second largest sand dune area (ca. 4600 km2 ), formed on the alluvial deposits of the Tisza River and its tributaries. At around 25 ka, fluvial processes terminated on the territory; and during the rest of the Pleistocene, aeolian processes prevaile. The strong north-westerly, northerly, north-north-easterly winds formed mostly blowouts, oval shaped sand hummocks and residual ridges. Parabolic sand dunes also evolved on a larger scale in the Nyírség. The first significant sand movement in the Nyírség happened in the Upper Pleniglacial and the Late Glacial. The main landforms of the Nyírség developed at this time. The aeolian transformation of the land has not finished at the end of the Pleistocene. In the Holocene the sand moved within small area, mainly by anthropogenic impact. Our aim is to clarify the age of the wind-blown sand movement periods, with different absolute dating methods (Radiocarbon dating method, OSL) and relative dating methods (palinolgical examinations, archeological finds). We collected soil (Gyüre, Vásárosnamény, Kótaj), charcoal samples (Gégény, Kántorjánosi, Nyíradony, Nagyvarsány, Máriapócs, Petneháza, Gyüre and Lövőpetri) from many sand quarries which contain fossil soil layer for radiocarbon dating. For the OSL measurements samples were collected from Baktalórántháza, Gégény and Kántorjánosi sand quarries. For the palinological analysis we made five boreholes (Máriapócs, Nyírtanya, Nyírábrány, Vámospércs and Nyírlugos) and we visited an archeological excavation near NyíregyházaOros. Different age determination methods supported each other well. The age data support the results of previous researches. In the Nyírség the first major sand movements happened in the cold and drier period of the Upper Pleniglacial and Late Glacial (Baktalórántháza, Máriapócs, Lövőpetri, Nagyvarsány-Szabadságtanya, Gyüre, Petneháza, Nyírábrány). At the end of the Pleistocene the sand movements have not finished in the Nyírség (Gégény, Kántorjánosi). Sand movement in the first half of the Holocene, in the Preboreal and in the Atlantic Phase took place due to climatic and anthropogenic effects also (Gégény, Kántorjánosi, Kótaj). In the Subatlantic Phase, there were many little sand movement periods, mainly caused by anthropogenic impacts (Nyíradony, Nyíregyháza-Oros, Nyírlugos).
ISBN:978-80-86407-77-7
Tárgyszavak:Természettudományok Földtudományok előadáskivonat
Aeolian activity
OSL
Radiocarbon dating
Pleistocene
Holocene
Nyírség
Hungary
Megjelenés:Geomorfologický sborník 16 : Proceedings of the conference State of geomorphological research in 2018 / ed. Zdeněk Máčka, Jaroslava Ježková, Eva Nováková, František Kuda. - p. 16-17. -
További szerzők:Lóki József (1946-) (geográfus) Sipos György (1979-) (geográfus) Négyesi Gábor (1980-) (geográfus) Andrási Bence (1991-) (geográfus) Jakab Attila Patakné Félegyházi Enikő (1944-) (geográfus) Molnár Mihály Négyesi Gábor (1980-) (geográfus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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