Micromorphological terms: The state of the art in soil microfabric research

Герасимова, М. И.; Kovda, I. V.; Лебедева, М. П.; Tursina, T. V.

doi:10.1134/s1064229311070052

Cited by 21 publications

(9 citation statements)

References 6 publications

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“…Мicromorphological (MM) studies were performed according to the Guidelines… [32] along with some approaches and terms used in Russia [7], in the Laboratory of Soil Mineralogy and Micromorphology of V.V. Dokuchaev Soil Science Institute; thin sections were prepared by М.А.…”

Section: Objects and Methodsmentioning

confidence: 99%

Micromorphological Interpretation of Natural and Anthropogenic Evolution of Soils in Bykovo Lacustrine-Alluvial Section of the Moskva River Floodplain

Герасимова

Savitskaya

2020

Eurasian Soil Sc.

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Soils of Bykovo lacustrine-like floodplain section have a complicated landuse history: alternation of meadows, suburban farming, cropland with partial land leveling and local drainage, now -10 years-old layland. The effects of these events along with manifestations of fluvial pedogenesis were studied in thin sections. Well-known micromorphological features of alluvial soils have been confirmed, specific properties related to the position of soils in lacustrine-alluvial landscape have been revealed. Fluvial fabric elements are rather mitigated, since flooding of this section was weak and irregular; topsoils are similar in natural and postarable soils and have no traces of agrogenic degradation. The layland regime contributes to soil regradation: higher pedality and pedofauna activity were recorded. Artificial drainage is recognized in thin sections by changes in iron (hydr)oxide pedofeatures vs. the natural gley soils, namely, iron segregations and nodules in the former soils (Fluvic Mollic Gleysols), and iron coatings, zones of complete bleaching alternating with strong impregnations in the latter. Soil on the terrace outlier was identified as a truncated texturally differentiated soil, which upper part was removed during leveling, then a new layer was placed on BT (argic) horizon: (Terric Anthrosol (Loamic, Gleyic, over buried Retisol)). Filled layers may contain blocky subangular peds of BT horizon, partially assimilated in the soil mass. These peds serve as micromorphological markers for reconstructing soil history owing to their easily recognizable particular properties: blocky subangular microstructure, speckled b-fabric, clay (hypo)coatings.

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Section: Objects and Methodsmentioning

confidence: 99%

Micromorphological Interpretation of Natural and Anthropogenic Evolution of Soils in Bykovo Lacustrine-Alluvial Section of the Moskva River Floodplain

Герасимова

Savitskaya

2020

Eurasian Soil Sc.

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“…The paleosol micromorphology was studied in thin sections (<30 µm thick) impregnated with polysynthetic resin. In describing thin sections and interpreting the soil formation processes we followed the techniques described in literature (Gerasimova et al 1992;Gerasimova et al 2011 Along with the investigation of the micromorpholology and morphology, the following components were determined in the paleosols: organic carbon, obtained using wet combustion technique developed by Tyurin (Rastvorova et al 1995); amorphous iron compounds, by Tamm's method (Tamm 1922), and non-silicate iron compounds, by Mehra and Jackson (1960). All the analyses were performed in the Chemical Analytical Laboratory, Institute of Geography, Russian Academy of Sciences.…”

Section: Fig 1 Position Of the Studied Sectionsmentioning

confidence: 99%

Micromorphology of the Late and Middle Pleistocene paleosols of the central East European Plain

Панин

Тимирева

Морозова

et al. 2019

Geogr. environ. sustain.

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In this paper we focused on the micromorphology of the Late and Middle Pleistocene paleosols exposed in twelve loess-paleosol sequences sections in the central part of the East European Plain. Each studied paleosol complex known as Mesin (MIS 5), Kamenka (MIS 6 (8) -7 ( 9)), and Inzhavino (MIS 8 (10) -9 (11)) pedocomplexes (PCs) consists typically of two members, the earlier -main -phase of the soil development taking place during an interglacial, and the later one -at the subsequent interstadial time. Interglacial paleosols formation is associated with the thermal optimum of climatic macrocycles and corresponds to conditions close to modern in the territory under consideration. Interstadial paleosols formation characterizes the intervals within the glacial period, accompanied by an increase in heat and moisture. However, the heat supply of such intervals did not reach modern level in this region (Velichko and Morozova 2015). As follows from the analysis of the soil micromorphology over the studied area, the soil microstructure experienced notable changes under changing latitudinal zonality. During the interglacial periods clay coatings and Fe-Mn pedofeatures dominated the soil microfabric; in the south loesspaleosol sequences coatings are in negligible quantities, Fe-Mn pedofeatures decrease in amount, and carbonate pedofeatures appear instead. In the microfabric of the interstadial paleosols, Fe-Mn pedofeatures are abundant, but unlike interglacial paleosols, the coatings are rare. Basically, the coatings are humus-clayey in composition, but in the more southern sections coatings are absent.

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“…However, black carbon decomposition is controversial, and there are different views on this issue. Some studies argue that black carbon decomposes very slowly (Liu et al, 2008) or is practically non-degradable (González-Pérez et al, 2004), while others show that it is successfully affected by chemical (Cheng et al, 2006(Cheng et al, , 2008 and microbial (Knicker et al, 2013;Marschner et al, 2008) oxidation. The assumption of black carbon complete stability in soils is doubtful because its content varies considerably in different soils.…”

Section: Soil Profile Analysis and Physico-chemical Propertiesmentioning

confidence: 99%

Micromorphological characteristics of sandy forest soils recently impacted by wildfires in Russia

Maksimova¹

2017

Preprint

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Two fire-affected soils were studied using micromorphological methods. The objective of the paper is to assess and compare fire effects on the micropedological organisation of soils in a forest-steppe zone of central Russia (Volga Basin, Togliatti city). Samples were collected in the green zone of Togliatti city. The results showed that both soils were rich in quartz and feldspar. Mica was highly present in soils affected by surface fires, while calcium carbonates were identified in the soils affected by crown fires. The type of plasma is humus-clay, but the soil assemblage is plasmasilt with a prevalence of silt. Angular and subangular grains are the most dominant soil particulates. No evidence of intensive weathering was detected. There was a decrease in the porosity of soils affected by fires as a consequence of soil pores filled with ash and charcoal.

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Micromorphological terms: The state of the art in soil microfabric research

Cited by 21 publications

References 6 publications

Micromorphological Interpretation of Natural and Anthropogenic Evolution of Soils in Bykovo Lacustrine-Alluvial Section of the Moskva River Floodplain

Micromorphological Interpretation of Natural and Anthropogenic Evolution of Soils in Bykovo Lacustrine-Alluvial Section of the Moskva River Floodplain

Micromorphology of the Late and Middle Pleistocene paleosols of the central East European Plain

Micromorphological characteristics of sandy forest soils recently impacted by wildfires in Russia

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