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Wyświetlanie 1-10 z 12
Tytuł:
Genetic interpretation of micromorphological features of gully less - soil deposits (case study : Kolonia Celejów, E Poland)
Autorzy:
Mroczek, P.
Rodzik, J.
Tematy:
gully erosion
loess
pedogenesis
soil degradation
micromorphology
Pokaż więcej
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Powiązania:
https://bibliotekanauki.pl/articles/294683.pdf  Link otwiera się w nowym oknie
Opis:
Five complex soil profiles in gully system on Nałeczów Plateau (E Poland) were examined. They represent the loess sediments modified by soil processes and postpedogenic transformations. Two examined profiles represent natural and mature Luvisols with diagnostic illuvial horizon (Bt argillic) developed on the edge of plateau geomorphologic level and in the relict valley bottom. The other soil profiles reflects postpedogenic soil degradation, redeposition and secondary accumulation (deluvia, colluvia and/or proluvia). Record of these processes are the micromorphological features created by lithological processes (=primary loess and secondary pedoliths) or by pedogenesis (mainly bioturbation, illuviation, de- and recalcification). The important group of microfeatures are pedorelicts which clearly confirm genetic dependences of pedoliths (deluvia and proluvia) and soils developed in situ and located in higher hypsometric levels in the catchment.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pedogenic and lacustrine features of the Brushy Basin Member of the Upper Jurassic Morrison Formation in western Colorado: Reassessing the paleoclimatic interpretations
Autorzy:
Tanner, L.
Galli, K.
Lucas, S.
Tematy:
aridisol
inceptisol
calcrete
palustrine
lacustrine
pedogenesis
pedogeneza
jeziorny
bagienny
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2077335.pdf  Link otwiera się w nowym oknie
Opis:
Study of the pedogenic features of the Upper Jurassic Morrison Formation in western Colorado, USA, shows a clear difference in the types of paleosols between the strata of the lower and upper Brushy Basin Member. Lower Brushy Basin paleosols are mostly calcareous Aridisols with Stage I through Stage III calcrete Bk horizons, abundant root traces, occasional vertic features, but only rarely with ochric epipedons. Upper Brushy Basin paleosols are mainly thicker and commonly display ochric epipedons and well-developed Bt and Bw horizons. We assign these paleosols to the order Inceptisol. Limestones occur in the Brushy Basin Member and include both uniformly micritic limestones and limestones with strongly brecciated textures. The former contain sparse body fossils and charophyte debris, while the latter are characterized by clotted-peloidal fabrics with circumgranular cracking and silica replacement. We interpret these limestones as the deposits of carbonate in small water bodies on a low-gradient flood plain, with the textures resulting from pedogenic reworking of the carbonate sediment. We find no evidence for the presence of extensive lacustrine or wetlands (Lake T’oo’dichi’) deposits in the study area. The paleoclimate suggested by all of these features is strongly seasonal, but subject to variations on orbital (precessional and higher) timescales causing intervals of semi-aridity during weaker monsoons, to alternate with sub-humid periods during stronger monsoons. The apparent long-term change in climate during Brushy Basin deposition potentially resulted from northward drift of North America.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geomorphological conditions of pedogenesis at the area of vistulian ice sheet presence on a basis of western surroundings of Poznan in Poland
Geomorfologiczne uwarunkowania rozwoju pokrywy glebowej na zapleczu strefy marginalnej lądolodu fazy leszczyńskiej w okolicy Poznania
Autorzy:
Cież, Oktawian
Opis:
History of landscape formation was specified in paper. Cause and effect relationship between geomorphology and pedology was prooven.
Po przybliżeniu rozwoju rzeźby terenu na omawianym obszarze wykazano w pracy związki przyczynowo skutkowe między geomorfologiczną działalnością lądolodu ostatniego zlodowacenia a zróżnicowaniem pokrywy glebowej. Nałożone na to są przemiany antropogeniczne prowadzące do zmniejszenia zawartości materii organicznej w poziomach próchnicznych gleb semihydrogenicznych
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Technogenic soils (Technosols) developed from fly ash and bottom ash from thermal power stations combusting bituminous coal and lignite : part II : mineral transformations and soil evolution
Autorzy:
Uzarowicz, Łukasz
Zagórski, Zbigniew
Skiba, Michał
Leue, Martin
Gąsiński, Arkadiusz
Trzciński, Jerzy
Opis:
Fly ash and bottom ash from thermal power stations are industrial wastes which are susceptible to weathering in the environment. First manifestations of transformations occur immediately after deposition of ashes in a disposal site and they continue in technogenic soils (Technosols) developing from the ashes on surfaces of such sites. Technosols developed from bituminous coal and lignite ashes in Poland were studied in order (a) to identify the most important mineral transformations during the first several decades of soil development, and (b) to discuss the evolution of these soils. Mineral transformations can serve as good indicators of pedogenesis in the studied Technosols. Quantitative X-ray diffraction analyses, Fourier transform infrared spectroscopy, optical microscopy, and scanning electron microscope-energy dispersive spectroscopy studies showed that the mineral transformations proceeded more dynamically in Technosols developed from lignite ashes, whereas they were less expressed in soils formed from bituminous coal ashes. Technosols developed from bituminous coal ashes contained mineral phases inherited from ashes (aluminosilicate glass, mullite, quartz, magnetite, hematite, and traces of maghemite and barite) as predominating constituents. Small contents of pedogenic calcite, iron oxyhydroxides, and most likely short-range order Si- and Al-containing phases originated within ~ 60 years of pedogenesis. Technosols developed from lignite ashes contained aluminosilicate glass, quartz, hematite inherited from fly ash, as well as a variety of secondary minerals (vaterite, calcite, bassanite, gypsum, ettringite, hydrotalcite, and brucite) which were formed as an effect of rapid mineral transformations after ash deposition. After about 40 years, pedogenesis (accelerated by reclamation and a few years of intense cultivation) led to the formation of a new mineral assemblage with the predomination of calcite, gypsum, and hydrotalcite. A concept of evolution of the studied Technosols comprising four stages of evolution was proposed: I - formation of ash during combustion of fuel (coal or lignite) in a thermal power station, II - transport and deposition of ash in a disposal site accompanied by the first weathering alterations, III - early pedogenesis, and IV - further (predicted) evolution.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Morphological and Physical Properties of Dehydrated Holocene Carbonate Limnic Deposits in Post-Bog Areas of NW Poland
Autorzy:
Jarnuszewski, G.
Meller, E.
Tematy:
outcropped carbonate deposits
pedogenesis
lacustrine chalk
calcareous gyttja
clay-calcareous gyttja
Pokaż więcej
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:
https://bibliotekanauki.pl/articles/124472.pdf  Link otwiera się w nowym oknie
Opis:
Holocene limnic deposits characteristic of the average latitudes have partially outcropped as a result of young glacial sculpture aging. The change of the environment from limnic to telmatic and often the interference of a man associated with the regulation of water relations led to the emergence of limnic deposits that underwent the process of pedogenesis. In this work, 137 samples of carbonate deposits from 6 sites in NW Poland were analyzed in terms of their physical properties. Carbonate sediments were subject to determination of specific and bulk densities, total porosity and air porosity, current and capillary water capacity. On the basis of CaCO3 content, combustion loss, and non-lime mineral content, the studied sediments were classified into three groups: lacustrine chalk, calcareous gyttja, and clay-calcareous gyttja. Studies have shown that the sediments subject to pedogenesis in the top levels have characteristic morphological features in the form of cracks and numerous channels and iron fills in the form of spotted, streaked or marbled mosaic. The top levels of sediments, as a result of dehydration, clearly increase their bulk density. Properties of the lake chalk were formed mainly by the proportion of organic matter and CaCO3, while in the case of carbonate gyttja, the influence of mineral parts of the non-lime substances is also highlighted. In the top of carbonate sediments, there is a decrease in general and capillary porosity and an increase in the share of macropores.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strange tadpoles from the lower Miocene of Turkey: Is paedogenesis possible in anurans?
Autorzy:
Dubois, A.
Grosjean, S.
Paicheler, J-C.
Tematy:
tadpole
Lower Miocene
Miocene
Turkey
paleontology
pedogenesis
anuran
Amphibia
Anura
egg
fossil
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/21427.pdf  Link otwiera się w nowym oknie
Opis:
Fossil material from the lower Miocene collected in the basin lake of Beşkonak (Turkey) included 19 slabs showing 19 amphibian anuran tadpoles of rather large size, at Gosner stages 36–38. These well preserved specimens show many morphological and skeletal characters. They are here tentatively referred to the genus Pelobates. Two of these tadpoles show an unusual group of black roundish spots in the abdominal region, and a third similar group of spots is present in another slab but we were unable to state if it was associated with a tadpole or not. Several hypotheses can be proposed to account for these structures: artefacts; intestinal content (seeds; inert, bacterial or fungal aggregations; eggs); internal or external parasites; diseases; eggs produced by the tadpole. The latter hypothesis is discussed in detail and is shown to be unlikely for several reasons. However, in the improbable case where these spots would correspond to eggs, this would be the first reported case of natural paedogenesis in anurans, a phenomenon which has been so far considered impossible mostly for anatomical reasons (e.g., absence of space in the abdominal cavity).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy metals in the forest soils of the South Podlasie Lowland
Autorzy:
Raczuk, J
Tematy:
anthropogenesis
Podlasie region
soil
lithogenesis
pedogenesis
soil property
forest soil
degraded ecosystem
anthropogenic ecosystem
heavy metal
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1449729.pdf  Link otwiera się w nowym oknie
Opis:
Concentration and profile distribution of heavy metals was investigated as contamination indicators of the forest soils formed from glacial deposits of the South Podlasie Lowland. The study was carried out on thirteen soil profiles situated a hundred meters from the road. The highest content of heavy metals was found in the organic horizons of the investigated soils. The mean content of Mn, Zn, Cu, Pb, Ni, Cr in the investigated soils were: 556.7, 72.9,15.5, 63.5,13.8, 16.5 mg/kg d.m. of the soil, respectively. In the mineral-organic and mineral horizons of the investigated soils heavy metals were present in quantities which were close to natural. The podzol soils, podzols and rusty soils developed from sands contain less heavy metals than the soils lessivés, black earth and deluvial soil. The Mn, Zn, Cu, Pb distribution in the soil profiles is influenced by the soil forming processes. The distribution index of the examined metals distribution in the genetic horizons testify to it.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 12

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