Palaeowind directions recorded in the youngest loess in Poland and western Ukraine as derived from anisotropy of magnetic susceptibility measurements

Nawrocki, Jerzy; Polechońska, Olga; Bogucki, Andriy; Łanczont, Maria

doi:10.1080/03009480600584907

Cited by 44 publications

(23 citation statements)

References 12 publications

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“…7b). This is consistent with what we would expect from wind‐blown material being transported by weak northeast winds (Nawrocki et al ., ). Interestingly, this direction is perpendicular to the dominating wind direction in the area as inferred from asymmetrical volcanic cones (wind towards 315°; Dawson, ; Mattsson and Tripoli, ; Mattsson, ).…”

Section: Discussionmentioning

confidence: 97%

The Lake Natron Footprint Tuff (northern Tanzania): volcanic source, depositional processes and age constraints from field relations

Balashova

Mattsson

Hirt

et al. 2016

J Quaternary Science

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The Engare Sero Footprint Site, situated on the southern shore of Lake Natron in northern Tanzania, has been reported to host one of the best preserved sets of fossilized hominid footprints in the world. However, until now there has been no detailed characterization and age determination of the footprint‐bearing strata (the Footprint Tuff). Here, we combine field observations with geochemical and mineralogical analyses and measurements of the anisotropy of magnetic susceptibility to constrain depositional processes, the role of reworking and the volcanic source for the Footprint Tuff. We find that the footprint‐bearing horizon consists of volcanic ash‐fall that has been slightly reworked by water, and that this was produced during a voluminous eruption of the Oldoinyo Lengai volcano. The unit, which covered the footprints and helped to preserve them, consists of the wind‐blown material from the same eruption, mixed together with locally derived detrital material. We can constrain the ash horizon to be of Holocene age, based on: (i) the location of the Footprint Tuff within the regional stratigraphy, (ii) previous age determination of an ash layer that can be correlated with the Footprint Tuff and (iii) the regional climatological history of the area. The ash horizon was probably deposited around 11000‐10500 years ago, but could potentially be even younger than this.

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Section: Discussionmentioning

confidence: 97%

The Lake Natron Footprint Tuff (northern Tanzania): volcanic source, depositional processes and age constraints from field relations

Balashova

Mattsson

Hirt

et al. 2016

J Quaternary Science

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“…parallel to the orientation of the Fennoscandian Ice Sheet (FIS) margin and to the axis of the lowland between this margin to the north and the Carpathian Mountains and the Podole Upland to the south (Nawrocki et al . ). It should be highlighted, however, that this conclusion was based on a very limited and dispersed sampling and the AMS axes were not analysed along the sections (op.…”

mentioning

confidence: 97%

“…AMS investigations of Ukrainian loess patches have been conducted in the westernmost part of Ukraine, being limited to remnants of the youngest unit deposited during the second marine isotope stage (MIS 2; Nawrocki et al . ) and to the loess/palaeosol sequence at Roxolany near the Black Sea only (Hus ; Nawrocki et al . ).…”

mentioning

confidence: 99%

Fluctuations of the Fennoscandian Ice Sheet recorded in the anisotropy of magnetic susceptibility of periglacial loess from Ukraine

Nawrocki

Bogucki

Gozhik

et al. 2019

Boreas

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The azimuth of imbrication of minimum magnetic susceptibility axes in the youngest loess from Ukraine defines prevailing wind directions during aeolian sedimentation. It changes along the studied sections. These changes can be directly correlated with the fluctuations of the Fennoscandian Ice Sheet. The northern and northeastern winds noted in the loess succession separated by a period when southwestern to southeastern winds were predominant may be correlated with two main phases of ice‐sheet advance during the Last Glacial Maximum. The ice‐sheet advances towards the areas of loess deposition generated katabatic winds that influenced aeolian sedimentation in the periglacial zone. A period of relatively stable wind directions during a younger phase of the Last Glacial Maximum was interrupted by periods with more chaotic wind regime most probably caused by fluctuations of the Fennoscandian Ice Sheet during its retreat from the peri‐Baltic part of Europe. These intervals occur where initial soils developed. The distribution of anisotropy of magnetic susceptibility axes defined along the periglacial loess sections from central and eastern Europe can serve to constrain fluctuations of the Fennoscandian Ice Sheet.

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“…Oblate magnetic fabrics with vertical minimum susceptibility axes are typical for the loess samples studied, being the common feature of western Ukrainian loess deposits (Nawrocki et al . ). Undisturbed sedimentary structure of magnetic fabrics is characteristic for all studied samples from pure loess.…”

Section: Palaeomagnetic Resultsmentioning

confidence: 97%

The Hilina Pali palaeomagnetic excursion and possible self‐reversal in the loess from western Ukraine

Nawrocki

Bogucki

Łanczont

et al. 2018

Boreas

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nczyk, M.2018 (July): The Hilina Pali palaeomagnetic excursion and possible self-reversal in the loess from western Ukraine. Boreas, Vol. 47, pp. 954-966.A loess-palaeosol succession from the last glacial cycle was palaeomagnetically studied in the Rivne abandoned brickyard (western Ukraine). Two samples of undisturbed loess from the same depth of parallel sections display steep negative inclinations. These reversed directions in the loess dated at c. 18 ka may possibly be correlated with the Hilina Pali palaeomagnetic excursion. This is the first occurrence of the Hilina Pali in a loess sediment. Unfortunately, the loess with negative inclination does not form any continuous layer that could be suitable for studies of detailed features of geomagnetic field inversion. Another six samples from an illuvial horizon of the Holocene soil also showed negative inclinations and strongly deviated declinations. This part of the section does not represent, however, any palaeomagnetic excursion. The anomalous magnetization in maghemite-and titanomagnetite-rich sediment results most probably from self-reversal remagnetization. A new insight into palaeomagnetic excursions noted in loess, especially in its parts affected by pedogenic processes, is recommended.

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Palaeowind directions recorded in the youngest loess in Poland and western Ukraine as derived from anisotropy of magnetic susceptibility measurements

Cited by 44 publications

References 12 publications

The Lake Natron Footprint Tuff (northern Tanzania): volcanic source, depositional processes and age constraints from field relations

The Lake Natron Footprint Tuff (northern Tanzania): volcanic source, depositional processes and age constraints from field relations

Fluctuations of the Fennoscandian Ice Sheet recorded in the anisotropy of magnetic susceptibility of periglacial loess from Ukraine

The Hilina Pali palaeomagnetic excursion and possible self‐reversal in the loess from western Ukraine

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