Temat: paleosol - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Late Pleistocene vegetational and soil evolution at the Kiev loess plain as recorded in the Stari Bezradychy section, Ukraine
Autorzy:: Gerasimenko, Natalia G.
Powiązania:: https://bibliotekanauki.pl/articles/2026769.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Pleistocene
paleosol
loess
pollen
Ukraine
Opis:: Pollen and palcopedological studies have been carried out in parallel for the Stari Bezradychy sequence of the Upper Pleistocene age. The paleoenvironmental information derived from both sets of data is in general well correlated. The section presents a rather complete sequence of the last interglacial-glacial cycle. It includes eight units of the Ukrainian Stratigraphical Framework of the Pleistocene. Interglacial climatic optimum is registered by pollen succession of the Mikulino (Ecmian) type in the climax forest palcosols of Pryluky-Kaydaky pedocomplcx at the base of the sequence, above the Dnieper Glacial deposits. The coldest and most continental environment is recorded in the youngest loess. The soils of Upper Pryluky, Yytachiv and Dofinivka units are correlated with the Early Glacial and four Plcniglacial interstadials. Multiple environmental variations during the Upper Pleistocene recorded in the Stari Bezradychy sequence arc important for study of global climatic changes and interregional correlation. Tentative correlation with marine isotopic stages is proposed.
Źródło:: Studia Quaternaria; 2000, 17; 19-28
1641-5558
2300-0384
Pojawia się w:: Studia Quaternaria
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Late Pleistocene loess-paleosol and vegetation successions at Tarnawce (San River valley, Carpathians foothills, Poland)
Autorzy:: Komar, Maryna
Łanczont, Maria
Powiązania:: https://bibliotekanauki.pl/articles/2027418.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Late Pleistocene
paleosol
loess
pollen
Carpathian Foothills
Opis:: The Tarnawce I profile, which occurs in the marginal eastern part of the Polish Westem Carpathians, contains loesses sq representing three last glacial cycles. In this paper we report the results of pollen analysis of the Eemian-Early Glacial pedocomplex and of the Lower plcni-Visrulian loesses with an interstadiał paleosol. The pollen spectra of22 samples were determined. The pollen diagram was divided into 7 local pollen assemblage zones (L PAZ). Interglacial climatic optimum was recorded with the Eemian type of vegetation in the T-4 zone. The coldest conditions occurred during the accumulation of loess, which separates the interglacial and interstadiał soils.
Źródło:: Studia Quaternaria; 2002; 27-35
1641-5558
2300-0384
Pojawia się w:: Studia Quaternaria
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Cosmic Airburst on Developing Allerød Substrates (Soils) in the Western Alps, Mt. Viso Area
Autorzy:: Mahaney, William C.
West, Allen
Milan, Alison
Krinsley, David H.
Somelar, Peeter
Schwartz, Stephane
Milner, Michael W.
Allen, Christopher C.R.
Powiązania:: https://bibliotekanauki.pl/articles/2025231.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Black Mat impact/airburst
Reconstructed soil at time of YDB
mid-LG-YD paleosol Sedimentary products of cosmic impact/glacial recession
Nauki o Ziemi
Opis:: Although much has been written about a cosmic impact event in the Western Alps of the Mt. Viso area, the event closely tied with the Younger Dryas Boundary (YDB) of 12.8 ka and onset of the Younger Dryas (YD), the affected land surface is considered to contain a similar black mat suite of sediment found on three continents. While work elsewhere has focused on recovered sediment from lake and ice cores, buried lacustrine/alluvial records, and surface glacial and paraglacial records, no one has traced a mountain morphosequence of deposits with the objective of investigating initial weathering/ soil morphogenesis that occurred in ice recessional deposits up to the YDB when the surface was subjected to intense heat, presumably, as hypothesized by Mahaney et al. (2016a) from a cosmic airburst. With the land surface rapidly free of ice following glacial retreat during the Bølling-Allerød interstadial, weathering processes ~13.5 to 12.8 ka led to weathering and soil morphogenesis in a slow progression as the land surface became free of ice. To determine the exposed land character in the mid- to late-Allerød, it is possible to utilize an inverted stratigraphic soil morphogenesis working backward in time, from known post-Little Ice Age (LIA) (i.e. time-zero) through LIA (~0.45 to ~0.10 ka), to at least the middle Neoglacial (~2 ka), to answer several questions. What were the likely soil profile states in existence at the end of the Allerød just prior to the cosmic impact/airburst (YDB)? Assuming these immature weathered regolith sections of the Late Allerød approximated the <1 ka old profiles seen today, and assuming the land surface was subjected to a hypothesized instant temperature burst from ambient to ~2200oC at ~12.8 ka, what would be the expected effect on the resident sediment? To test the mid-LG (YDB) to YD relationship we analyzed the paleosols in both suites of deposits – mid-LG to YD – to test that the airburst grains are restricted to Late Allerød paleosols and using relative-age-determination criteria, that the overlapping YD to mid-LG moraines are closely related in time. These are some of the questions about the black mat that we seek to answer with reference to sites in the upper Guil and Po rivers of the Mt. Viso area.
Źródło:: Studia Quaternaria; 2018, 35; 3-23
1641-5558
2300-0384
Pojawia się w:: Studia Quaternaria
Dostawca treści:: Biblioteka Nauki

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