Pedology and Hydrology of Some Surface-Water Gley Soils

Thomasson, J. Alex; Bullock, Philip Ross

doi:10.1097/00010694-197505000-00003

Cited by 12 publications

(8 citation statements)

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“…General changes of plasmic fabric with depth in surface-water gley soils have been noted by Rudeforth (1970), Ragg & Clayden (1973) and Thomasson &Bullock (1975). Specific changes in plasmic fabric with depth in the surface-water gley soils studied here are shown in Table 3, and in Fig.…”

Section: Crystalline/amorphous' Fe (Fef) (Yo) [(L)-(il)]supporting

confidence: 77%

“…The trend is least striking in Profile 3 and most striking in Profile 2, in which the K20 content falls from 3.5% at 125-155 cm to 1.3% in the surface horizon. The corresponding values for CEC are 34 meq/100 g and 63 meq/100 g. The weathering of mica and its replacement by interstratified mica-smectite or mica-vermiculite has been noted in other surface-water gley soils in England and Wales (Thomasson & Bullock, 1975;Avery & Bullock, 1977).…”

Section: General Morphology and Compositionmentioning

confidence: 87%

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The morphology and genesis of eight surface‐water gley soils developed in till in England and Wales

Murphy

1984

Journal of Soil Science

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The morphology is described of eight surface-water gley soils developed in till in Wales and central and northern England. Physical and chemical analyses as well as micromorphological observations are used to investigate processes affecting the genesis of the soils.The characteristic property of surface-water gley soils, namely slowly permeable subsurface horizons, causes a degree of periodic waterlogging within the profile. Effects of gleying and shrink/swell processes are described.Three main aspects of weathering are shown to be operating: decalcification in two of the three calcareous profiles, the breakdown of coarse into finer particles and the alteration of the clay fraction, chiefly the formation of mixed-layer minerals from mica.Argillic B horizons are present in some soils. In profiles developed in calcareous till the degree of decalcification relates strongly to the amounts of recognizable clay concentrations as seen in thin section. Of the other five profiles three clearly have argillic B horizons. Problems associated with the identification of argillic B horizons in surface-water gley soils in till are discussed.

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Section: Crystalline/amorphous' Fe (Fef) (Yo) [(L)-(il)]supporting

confidence: 77%

Section: General Morphology and Compositionmentioning

confidence: 87%

The morphology and genesis of eight surface‐water gley soils developed in till in England and Wales

Murphy

1984

Journal of Soil Science

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“…The matrix‐rich debrites and interbed mudstone discontinuities of the Trichrug fan system are likely to have generated low surface water infiltration capacity. Such conditions would have caused waterlogging in the upper soil horizons during periodic rainstorms, leading to surface water gley soils (Thomasson & Bullock, 1975; Brammer & Brinkman, 1977). Soils on fault‐related alluvial fans can develop over long periods of time, depending on the activity of the fault system, and can reflect both stable and unstable areas of the fan surface, with stable areas identified by deep well‐developed soils and soils with surface water gley features developing on colluvial material (Muggler & Buurman, 2000).…”

Section: Depositional Environmentmentioning

confidence: 99%

Alluvial fan and wetland interactions: evidence of seasonal slope wetlands from the Silurian of south central Wales, UK

Hillier¹,

Waters²,

Marriott

et al. 2010

Sedimentology

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Distal environs of the Ludlow-age Trichrug Formation from south central Wales (UK) detail deposition on the outer fringe of an ephemeral debris flowdominated alluvial fan. Debrites and subordinate sheetflood deposits are interbedded with sporadic thin sandstone-dominated heterolithic units deposited in shallow, ephemeral ponds in the axial valley. The latter slope wetland system fringed the permeable alluvial fan deposits, being maintained by streamflow, precipitation and ground water recharge. A prolonged high water table is indicated by low chroma intervals interpreted as the result of gleying. A variety of redoximorphic indicators, including colour mottling and ferricrete concretions, are evidence of iron mobilization and concentration associated with a seasonally fluctuating water table. The slope wetlands were colonized periodically by Skolithos-generating organisms, most likely to have been arthropods. The widespread occurrence of redoximorphic indicators and ferricrete contrasts markedly with calcrete Vertisols in penecontemporaneous continental deposits (Lower Old Red Sandstone) of the region. It is likely that the alluvial fan-toe area was the site of a wetland depression, which maintained a high, though fluctuating, water table. In contrast the alluvial channel reaches of the surrounding drainage network were significantly better drained, with floodplains prone to wetting and drying and Vertisol palaeopedogenesis.

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“…Each of the soil iron oxide minerals exists in relatively wellordered crystalline form (such as magnetite) to short-range (e.g., ferrihydrite) or poorly crystalline (Thomasson and Bullock 1975). Commonly, decomposition of the soil matrix followed by selective dissolution techniques, prior to chemical analysis, is applied to quantify the relative proportion of iron oxides.…”

Section: Distribution Of Iron Oxides Forms On a Transect Of Calcareoumentioning

confidence: 99%

Distribution of iron oxides forms on a transect of calcareous soils, north-west of Iran

Rezapour

Jafarzadeh

Samadi

et al. 2010

Archives of Agronomy and Soil Science

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The iron oxides fractions of four major physiographic units obtained from a transect of calcareous materials were studied to assess the effects of key pedogenic processes and local hydrology conditions as well as physiographic units in controlling iron oxides forms in the north-west of Iran. Samples from different horizons belonging to six pedons were selected and analyzed for soil physicochemical properties, clay minerals, and Fe oxides forms (Fe d , Fe o , Fe p ). In general, the soils indicated some variation in the concentration of iron oxides that could be related to rate of weathering, pedogenic accumulations, geomorphologic conditions (as results of different in physiographic units), wet and dry cycle, and organic matter. A wide relative variation in mean values of Fe d (6.4-9.9 g kg 71 ), Fe o (2.9-4 g kg 71 ), and Fe p (0.68-1.3 g kg 71 ) was observed among physiographic units. On the plateau unit, the presence of the most stable geomorphologic conditions and high rate in situ weathering (reflected in clay content), coupled with minor deposition of sediment suggest that the soils have more dynamic conditions than other units, reflecting in the greatest amount Fe d and the lowest Fe o /Fe d ratio. Fe d content of the soils containing less clay content (15-25%) was significantly different from those with greater clay content (25-35%).

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Pedology and Hydrology of Some Surface-Water Gley Soils

Cited by 12 publications

References 0 publications

The morphology and genesis of eight surface‐water gley soils developed in till in England and Wales

The morphology and genesis of eight surface‐water gley soils developed in till in England and Wales

Alluvial fan and wetland interactions: evidence of seasonal slope wetlands from the Silurian of south central Wales, UK

Distribution of iron oxides forms on a transect of calcareous soils, north-west of Iran

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