New Trends in Soil Micromorphology
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Soil evolution along a topsequence on glacial and periglacial materials in the Pyrenees range, Spain,- 5. A micromorphological study of Andosol genesis in Iceland,- 6. Improved paleopedological reconstruction of vertic paleosols at Novaya Etuliya, Moldova, via integration of soil micromorphology and environmental magnetism,- 7.
Ferricretes in Tamil Nadu, Chennai, South Eastern India: from landscape to micromorphology, genesis and paleoenvrionmental significance,- 8. Palygorskite dominated vertisols of Southern Iran,- 9. Contribution of micromorphology to classification of aridic soils,- Orientation and spacing of columnar peds in a sodic, tecture contrast soil in Australia,- Physical fractionation or mormoder humus using cryo-coupes and micromorphological methods,- Regional manifestation of the widespread disruption of soil-landscapes by the 4 kyr BP impact using pedo-sedimentary micro-fabrics,- Clay illuviation in a Holocene palaeosol in the Chinese Loess Plateau,- Soil microstructure and solution chemistry of a compacted forest soil in a sub-boreal spruce zone in Canada.
Newsletter Google 4. Help pages. Prothero Michael J. Benton Richard Fortey View All. Go to British Wildlife. Conservation Land Management. Go to Conservation Land Management. Publisher: Springer Nature. More about Geosciences Soil micromorphology.
New trends in soil micromorphology 
Faculty library sciences Open print view. Mon 18 Nov Study Resto S5 : u. Tue 19 Nov Study Resto S5 : u. Wed 20 Nov Study Resto S5 : u. Thu 21 Nov Study Resto S5 : u. Fri 22 Nov Study Resto S5 : u. Sat 23 Nov closed Sun 24 Nov closed More opening hours. Stoops, Georges viaf Edition: 1st ed. Publisher: Berlin : Springer, Description: 1 online resource xiii, p. Additional profiles were studied and sampled in the areas, affected by forest fires. Bulk samples for physical and chemical analyses, as well as undisturbed samples for thin sections, were collected from genetic horizons.
Soil colors were determined according to the Munsell Soil Color Charts Thin sections were prepared from undisturbed soil samples impregnated with resin, and studied under a petrographic microscope with descriptions following the terminology of Bullock et al. To identify neoformed crystalline components in the soil affected by forest fire, we studied soil materials under electron microscope equipped with an EDX microprobe, and obtained powder X-ray diffractogramms from the material enriched with the neoformed component to be identified. In all geomorphological positions, including wetlands, we observed typical results of karstic alteration, forming fractures and sinkholes.
This horizon has a very well developed granular structure, and a high root density. Weathered limestone fragments are common; however, there is no reaction to HCl, indicating that soil matrix is free of carbonates.
It was classified as Leptic Calcaric Phaeozem profiles 1 and 2. Other upland soils are thinner and more stony profile 3. The Ah horizon less than 10 cm thick , with a less developed granular structure, rests directly on limestone. In this case, they were classified as Rendzic Leptosols. Similar soils in areas recently affected by fire and currently occupied by ferns, have signs of disturbance and turbation profiles 9 and Dark grey humus-rich material, typical for Rendzina Ah horizon, are mixed with red mottlesb and charcoal Powdery white material, showing clear reaction with HCl, is distributed unevenly over all above mentioned morphological elements.
Another soil type was identified in a similar upland position, to the north-west of the transect Fig. In this location, soils are thicker 35 cm , and more clayey profile The B horizon, 15 cm thick, has a subangular blocky structure, is very hard when dry, and very clayey. The C horizon is rich in weathered limestone fragments, although the complete profile has no reaction to HCl.
It was classified as Chromic Cambisol. Within these depressions, soils are somewhat deeper and clayey. Bioturbation is strong and the presence of Fe concretions is common. Weathered limestone fragments are found at a depth of 24 cm, but horizons have no reaction to HCl. The soil was classified as Leptic Gleyic Phaeozem. In the wetlands, periphyton appears, forming a soft patchy crust on the surface. Periphyton is a complex community of algae and other aquatic microorganisms that form in seasonal bodies of water such as wetlands see Wetzel and are deposited on the land surface in the dry period.
Below we found a rather thin less than 10 cm thick gray Bk horizon, consisting mainly of fine secondary calcite and containing mollusk shells. It was classified as Leptic Calcisol. In the wet season this soil is flooded, however in the dry period when the description was made it was saturated with water. In intermediate positions, between uplands and the lower areas of wetland, where forest is restricted to gentle slopes, periphyton appears again. It is sandy and rich in carbonates. Below, a well developed soil profile was found. The buried A horizon is dark brown 7.
Its organic carbon content is low 1. The Bw horizon, 10 cm thick, is similar in color 7. The underlying C horizon has many weathered limestone fragments. This soil can be regarded as polygenetic, because two different cycles of pedogenesis and sedimentation were recognized. Under higher magnification, a large part is dominated by fine detritus. Larger fragments of plant tissues in different stages of decomposition are also abundant.
This material is organized in rather coarse subangular blocks or in small crumbs of irregular shape. Carbonate particles of various sizes are frequent in the groundmass. On the contrary, all kinds of silicate materials, and in particular clay, are scarce. We found only few clay-rich rounded aggregates with lighter yellow-brown color and speckled to granostriated b-fabric, embedded in the dark isotropic predominantly organic groundmass Fig.
Despite the macromorphological similarity with Rendzic Leptosols, the micromorphological properties of the two Leptic Calcaric Phaeozem profiles 1 and 2 are quite different. Groundmass is completely free of carbonates and very rich in fine clay material with scarce siltsize quartz grains embedded in it. Clay has stipple-speckled b-fabric and rather low birefrigence, groundmass has a reddish-brown color; due to staining with iron oxides.
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Organic materials are present in different forms. Fragments of plant tissues are rather frequent, with signs of decomposition by microbes or mesofauna. Mottles of dark gray-brown organic pigment and tiny black specks are abundant within groundmass. The material is remarkably well aggregated: granules of various size and small subangular blocks, all of coprogenic origin, are partly welded, to form the porous aggregates of higher order, and all together produce spongy fabric with a dense void system Fig.
Soils formed in the small karst depression have a quite specific set of micromorphological features of the Bg horizon. It is compact, and its structure is dominated by subangular to angular blocks separated by fissures. The color of soil material is brown-yellow, with dark- brown areas corresponding to frequent ferruginous nodules and mottles Fig. The groundmass is rich in clay, having porostriated, granostriated thick envelopes of oriented clay round the ferruginous nodules and mosaic-speckled b-fabric.
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Stress cutans are rather frequent along open and closed fissures Fig. A few deformed clay illuvial pedofeatures was found only in this horizon. Few charcoal fragments are embedded in the groundmass Fig.
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The micromorphology of the Leptic Calcisol in the wetland implies a quite distinct mode of pedogenesis. The major part of groundmass consists of carbonates — in contrast to highland Phaeozems and Cambisols, in which groundmass is dominated by silicate clay. However, these carbonates are represented not by fragmented parent limestone, as in Rendzic Leptosol, but exclusively by neoformed micritic calcite.
Micrite with admixture of microsparite forms blocky and granular aggregates, often welded to build up spongy fabric with high porosity.
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Frequently the micrite accumulations have specific biogenic microstructure: ooids Fig. Granules are often colored with dark-brown organic pigment — the presence of which lowers the material birefrigence. Partly decomposed plant tissues, as well as shell fragments Fig. Soils on the gentle slope towards the wetland 26 S. According to earlier observations, some of the soils profile 5 are typical for the wetlands, and others, for the upland soils.
However, the underlying Ah and Bw horizons resemble the Phaeozems of elevated landsurfaces.