Temat: periglacial environment

Skocz do pozycji: 1.

Tytuł:: Permafrost and periglacial environment of Western Tibet
Autorzy:: Fort, F.
van Vliet-Lanoe, B.
Tematy:: permafrost
periglacial environment
Western Tibet; Pokaż więcej
Wydawca:: Stowarzyszenie Geomorfologów Polskich
Powiązania:: https://bibliotekanauki.pl/articles/294530.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Multi-method geophysical mapping of ground properties and periglacial geomorphology in Hans Glacier forefield, SW Spitsbergen
Autorzy:: Marciniak, Artur
Osuch, Marzena
Wawrzyniak, Tomasz
Owoc, Bartosz
Dobiński, Wojciech
Glazer, Michał
Majdański, Mariusz
Tematy:: Arctic
Svalbard
geophysical imaging
periglacial environment
glacial landforms; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/16538466.pdf Link otwiera się w nowym oknie
Opis:: This article presents the results of a geophysical survey from which detailed images of glacial and periglacial landforms and subsurface structures were obtained. Sediments and landforms on newly deglaciated terrain can be used to reconstruct the extent and character of glaciers in the past and add to the understanding of their response to climate and environmental changes. To derive spatial information from complex geomorphological terrain, joint interpretation of three non-intrusive geophysical methods were applied: Electrical Resistivity Tomography (ERT), Ground Penetrating Radar (GPR), and time-lapse Seismic Tomography. These were used to identify subsurface structures in the forefield of the retreating Hans Glacier in SW Spitsbergen, Svalbard. Three main zones were distinguished and described: outwash plain, terminal moraine from the last glacial maximum, and glacial forefield proximal to the glacier front. Geophysical profiles across these zones reveal information on glacio-fluvial sediment thickness and structure, ice thickness and structure, and bedrock topography. The freezing-thawing effect of the active layer has a strong and deep impact, as demonstrated by variations in P-wave velocity in the obtained outcomes. The results are discussed in the context of the current climate in Svalbard. This study provides a snapshot of ground parameters and the current state of the subsurface in southern Spitsbergen. The boundary between sediment-bedrock layers was estimated to be from 5 to 20 m in depth. It is the first such extensive description of periglacial structures in the forefield of the Hans Glacier, utilising the longest ERT profile (1500 m) in Svalbard together with deep GPR and precise seismic tomography.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Unikalne stanowisko szczątków mamuta na Dolnym Śląsku
Unique site of the mammoth remains in the Lower Silesia
Autorzy:: Wiśniewski, A.
Wojtal, P.
Krzemińska, A.
Zych, J.
Przybylski, B.
Badura, J.
Ciszek, D.
Tematy:: mamut
vistulian
środowisko peryglacjalne
Dolny Śląsk
mammoth
Weichselian glaciation
periglacial environment
Lower Silesia; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2074685.pdf Link otwiera się w nowym oknie
Opis:: Aunique set of mammoth bones and tusk was found in active gravel pit in vicinities of Zastruże near Żarów, Lower Silesia. The use of archaeological methods made it possible to uncover 17 bones belonging to a single individual (Mammuthus primigenius). This is the first record of so complete set of mammoth bones in the Lower Silesian region. Mammoth remains were found to be accompanied by some bones of a horse and a flint artifact. The mammoth bones were dated radiocarbon method at 23 790 š 160 years, that is at the beginning of the last Pleniglacial of the Weichselian Glaciation. The mammoth remains were embedded in slope sediments of a small valley so they did not occurin anatomical order.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland
Autorzy:: Zieliński, P.
Sokołowski, R. J.
Fedorowicz, S.
Woronko, B.
Hołub, B.
Jankowski, M.
Kuc, M.
Tracz, M.
Tematy:: climate change
periglacial environment
fluvial processes
aeolian processes
luminescence dating
zmiana klimatu
środowisko peryglacjalne
procesy fluwialne
procesy eoliczne
datowanie luminescencyjne; Pokaż więcej
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/94513.pdf Link otwiera się w nowym oknie
Opis:: Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.
Dostawca treści:: Biblioteka Nauki

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