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Genesis of floodplain soils with a light-colored horizon

Genesis of floodplain soils with a light-colored horizon
Alluvial soil ; Classification ; Floodplain ; Fluvial processes ; Pedogenesis ; Soil ; USSR
Classification ; Fluviatile ; Oka vallée ; Plaine d'inondation ; Pédogenèse ; Sol ; Sol alluvial ; URSS
Field and modern analytical methods have shown that Floodplain soils with a pronounced A2 horizon are a large group of soils that occur under various ecologic conditions. They include Alluvial Sod Acid and Meadow Acid residual podzolized or residual
Gray Forest soils, Alluvial Sod-Podzolic and Alluvial Gray Forest residual-sod soils, Alluvial Pseudopodzolic (Pseudogley) soils, Alluvial Sod-Podzolic soils, and Alluvial Gray Forest soils. Classification and nomenclature of these soils should take
into account their ecology and formation history as well as their morphology. Floodplain soils with a differentiated profile, formed dominantly by eluvial-gley and lessivage, are the dominant soils in this group.―(L'Ed.).

Thermoluminescence dating and chemistry of Quaternary sodic alluvial soils in the Venezuelan savanna

Thermoluminescence dating and chemistry of Quaternary sodic alluvial soils in the Venezuelan savanna
Dating ; Geochemistry ; Paleoclimatology ; Quaternary ; Soil ; Soil properties ; Soil science ; Thermoluminescence ; Venezuela
Pedological analyses and thermoluminescence dating were carried out on two soil profiles in the alluvial plain of the Orituco River, to determine if the chemical properties of the soil subhorizons are related to the paleoclimatology of the region.

Relationship between alluvial soils and flooding in the piedmont lowland of south eastern Pennsylvania

Relationship between alluvial soils and flooding in the piedmont lowland of south eastern Pennsylvania
Crue ; Etats-Unis ; Extension spatiale ; Géographie physique ; Inondation ; Pennsylvania ; Piedmont ; Plaine d'inondation ; Prévision ; Sol ; Sol alluvial

Identification of facies models in alluvial soil formation : the case of a Swiss alpine floodplain

Identification of facies models in alluvial soil formation : the case of a Swiss alpine floodplain
Alluvial soil ; Alps (The) ; Ecosystem ; Environmental management ; Floodplain ; Model ; Pedogenesis ; Rehabilitation ; Soil properties ; Statistics ; Stream ; Switzerland
Alpes ; Cours d'eau ; Ecosystème ; Gestion de l'environnement ; Modèle ; Plaine d'inondation ; Propriétés du sol ; Pédogenèse ; Réhabilitation ; Sol alluvial ; Statistique ; Suisse
This paper describes different conceptual facies models intervening in alluvial soil formation in the case of the Sarine River floodplain, a partially embanked floodplain situated in the northwest of the Swiss Alps. Alluvial soils are submitted

New principles for the classification of alluvial soils

New principles for the classification of alluvial soils
Alluvial soil ; Classification ; Floodplain ; Ob ; Russia ; Soil ; Typology
Classification ; Ob' ; Plaine d'inondation ; Russie ; Sol ; Sol alluvial ; Typologie

A comparison of methods to predict soil surface texture in an alluvial basin

A comparison of methods to predict soil surface texture in an alluvial basin
Arid area ; California ; Cartography ; Geostatistics ; Methodology ; Soil ; Soil properties ; United States of America
Surface soil texture controls many important ecological, hydrological, and geomorphic processes in arid regions and is therefore important from a land-management perspective. This article compares several different predictive soil-mapping techniques
with a sparse dataset in order to develop surficial soil texture maps. The results suggest that data collected at the landscape scale can be used as input to predictive soil-mapping techniques to create maps of soil texture at higher fidelity and a fraction

Late Quaternary alluvial history of Nowlands Creek, Hunter Valley, NSW

Late Quaternary alluvial history of Nowlands Creek, Hunter Valley, NSW
Archeological site ; Australia ; Chronology ; Fluvial processes ; Fluvial terrace ; Holocene ; Northwest Territories ; Pleistocene ; Soil ; Stratigraphy ; Valley
The purpose of this paper is to unravel the alluvial history of Nowlands Creek at the archaeological sites. In particular, the river terraces and their stratigraphy, soils and chronology will be evaluated to separate Pleistocene from Holocene

Late Holocene soil formation in the valley of the River Yenisei, Central Siberia

Late Holocene soil formation in the valley of the River Yenisei, Central Siberia
Alluvial sod soil sequences from the 9 m terrace in the valley of the River Yenisei were used to reconstruct the paleoecological history and the paleohydrological regime of the river. This paper describes the alluvial soils and establishes
the processes of organic matter transformation in the Holocene alluvial sod soils in relation to changing Holocene environments.

Alluvial fans as records of Holocene sediment yield in the central Great Plains of southwest Nebraska

Alluvial fans as records of Holocene sediment yield in the central Great Plains of southwest Nebraska
Alluvial cone ; C 14 dating ; Climatic variation ; Geochronology ; Holocene ; Nebraska ; Palaeosol ; Quaternary ; Sediment budget ; Stratigraphy ; United States of America
On alluvial fans, increased rates of sedimentation are directly related to increased sediment yields from their watersheds. Since well developed soils imply prolonged landscape stability, soils that are buried by alluvial-fan deposits are evidence
of a shift, at least locally, toward increased sediment yields. The objective of this paper is to propose a Holocene history of sediment yield increases in the central Great Plains based on the record that buried alluvial-fan soils provide.

Late Vistulian and Holocene fossil soils developed from aeolian and alluvial sediments of the Warsaw Basin

Late Vistulian and Holocene fossil soils developed from aeolian and alluvial sediments of the Warsaw Basin
C14 dating ; Eolian features ; Palaeo-environment ; Palaeosol ; Palynology ; Pedogenesis ; Poland ; Quaternary ; Soil ; Stratigraphy
Stratotype profiles of fossil soils of the Late Vistulian and Holocene developed from alluvial and aeolian sediments were recognized. Different analyses and radiocarbon dating of organic substance enabled to distinguish diagnostic pedostratigraphic
horizons, what allowed to determine the age and produce a typology of soils. On the basis of soil dating, indirectly a precise determination of alluvial and aeolian processes in the Warsaw Basin was carried out. The bottom of organic substance of the oldest
among fossil soils in the Warsaw Basin was dated for 13,340 years B.P. The mineral sediments of this horizon are still older.

Soils in the Holocene alluvial sediments of the Rio Fraja Valley, Spain : in situ or soil-sediments ?

Soils in the Holocene alluvial sediments of the Rio Fraja Valley, Spain : in situ or soil-sediments ?
of erosion, sedimentation and pedogenesis during the last 4000 years. The data sets allow to distinguish soils formed in situ from transported soil-sediments. The AA. suggest that in alluvial sequences magnetostratigraphic records can be used to distinguish
In the Holocene alluvial deposits of the Fraja Valley (Cadiz Province, SW Spain) the AA. have used geomorphological, mineralogical, sedimentological and paleomagnetic data with dating based on radiocarbon and pottery to distinguish episodes
periods of land surface stability, when pedogenetic processes prevailed under a vegetation cover, and morphodynamically active periods, in which soil erosion, transportation and sedimentation predominated.

Alluvial soil chronosequence in the inner coastal plain, Central Virginia

Alluvial soil chronosequence in the inner coastal plain, Central Virginia
Chronosequence ; Fluvial terrace ; Soil ; Soil properties ; United States ; Virginia ; Weathering
The purpose of this study was to document the chronological sequence of soils present on an extensive series of terrace deposits found along the James River in the Fall Zone of central Virginia. Some of the oldest soils and landforms in the Virginia
Coastal Plain are present here, along with fluvial terraces that correlate with coastal terraces farther east. The AA. clarify soil-geomorphic relations and provide a basis for allostratigraphic subdivision of the inner Coastal Plain.

Impacts of Holocene climatic variations on alluvial fan activity below snowpatches in subarctic Québec

Impacts of Holocene climatic variations on alluvial fan activity below snowpatches in subarctic Québec
Alluvial cone ; Canada ; Climatic variation ; Dendrochronology ; Holocene ; Nivation hollow ; Periglacial features ; Precipitation ; Quebec ; Snow ; Soil moisture
In the Lake Guillaume-Delisle area of subarctic Québec, storm-generated alluvial fans have been active sporadically throughout the Holocene. In this study, the AA. propose that the persistence of late-lying snowpatches in fan catchments during
Holocene cold episodes promoted alluvial fan activity by lowering the precipitation threshold required to trigger a torential event. This hypothesis was tested by characterizing the depositional processes responsible for alluvial fan formation below
snowpatches, and by reconstructing the Holocene alluvial fan activity.

Environmental controls on the evolution of alluvial fans in Buena Vista Valley, North Central Nevada, during late Quaternary

Environmental controls on the evolution of alluvial fans in Buena Vista Valley, North Central Nevada, during late Quaternary
Alluvial cone ; Climatic variation ; Impact ; Nevada ; Palaeo-environment ; Quaternary ; Sedimentology ; Soil ; Stratigraphy ; Tectonics ; United States of America
This study evaluates the relative influences of the environmental factors on the evolution of alluvial fans in Buena Vista Valley, north-central Nevada. The objectives of this study include : delineating the surficial stratigraphy of the alluvial
fan deposits; relating the stratigraphy of alluvial fans to geomorphic features and deposits associated with the climatic and tectonic history of the basin; establishing a temporal framework for the stratigraphy and comparing it to that developed
regionally by Hawley and Wilson (1965); and, examining the driving forces of aggradation and entrenchment on alluvial fans in Buena Vista Valley.

Geochemical equilibria of iron in sediments of the Roaring River alluvial fan, Rocky Mountain National Park, Colorado

Geochemical equilibria of iron in sediments of the Roaring River alluvial fan, Rocky Mountain National Park, Colorado
Alluvial cone ; Colorado ; Fluvial processes ; Geochemistry ; Iron ; Organic materials ; Precipitation ; Rocky Mountains ; Soil moisture;Soil water ; United States
Colorado ; Cône alluvial ; Eau du sol ; Etats-Unis ; Fer ; Fluviatile ; Géochimie ; Matière organique ; Précipitation ; Rocky Mountains ; Variation spatio-temporelle
Iron geochemistry of the sediments and interstitial waters of the Roaring River alluvial fan in the Rocky Mountain National Park, was studied using a chemical equilibria approach. The presence of a well-dated deposit with well-defined hydrological
conditions has enabled to investigate the chemical equilibria of iron in a field setting by sampling sediments, buried soils, stream, and interstitial waters using various chemical and mineralogical analyses.

The rate of iron oxide enrichment in arid zone alluvial fan soils, Tunisian southern atlas, measured by mineral magnetic techniques

The rate of iron oxide enrichment in arid zone alluvial fan soils, Tunisian southern atlas, measured by mineral magnetic techniques
Alluvial cone ; Arid area ; Atlas ; Geochemistry ; Geochronology ; Iron ; Magnetic susceptibility ; Pedogenesis ; Quaternary ; Soil properties ; Tunisia
Rates of iron oxide enrichment of soils on a segmented alluvial fan in southern Tunisia are examined. Mineral magnetic and chemical characteristics of soils developed on 2 dated relict segments and on contemporary alluvium suggest that the rate

The application of fuzzy classification to soil pH profiles in the Lockyer Valley, Queensland, Australia

The application of fuzzy classification to soil pH profiles in the Lockyer Valley, Queensland, Australia
Australia ; Classification ; Numerical analysis ; Queensland ; Soil ; Soil sciences
This paper examines the application of fuzzy classification to the pH profiles of soils in the alluvial plain of the Lockyer Valley. Fuzzy classification usefully demonstrates relationships between profiles among the transect and is a potentially
valuable method for examining the variability of soil in complex landscapes.

Properties and development of soils on reclaimed alluvial sediments of the Humber estuary, eastern England

Properties and development of soils on reclaimed alluvial sediments of the Humber estuary, eastern England
Alluvium ; Chronosequence ; England ; Estuary ; Geochemistry ; Grain size distribution ; Pedogenesis ; Soil improvement ; Soil properties ; United Kingdom ; Yorkshire and Humberside
Sunk Island, an area of reclaimed estuarine alluvial sediments in the lower Humber estuary, provides a series of recent surfaces ranging from around 100 to 260 years old, upon which soil properties associated with soil ripening can be examined free
accumulation and tillage. Variations in aeration and moisture content have resulted in mottling, which has become less prevalent as the soils develop.

Holocene river alluviation in Britain

Holocene river alluviation in Britain
Alluvial plain ; Climatic variation ; England ; Fluvial processes ; Holocene ; Human impact ; Scotland ; United Kingdom
Episodes of regional and country-wide Holocene alluviation in British river basins are identified using information from 59 published sites that extend from northern Scotland to the south coast of England. Widespread synchrony of Holocene fluvial
and agriculture were important for initiating soil erosion.

Holocene dune-sourced alluvial fans in the Nebraska Sand Hills

Holocene dune-sourced alluvial fans in the Nebraska Sand Hills
Cône alluvial ; Dune ; Eolien ; Erosion ; Etats-Unis ; Holocène ; Nebraska ; Photo-interprétation ; Quaternaire ; Ravinement ; Stratigraphie ; Variation climatique
The aim of this study is to characterize the alluvial fans of the Nebraska Sand Hills, to provide a complete description of the deposits and source area, and to interpret the history and processes of their deposition. The AA. will show that local
hydrology, climate, soils, dune morphology, and range management control the erosion of dunes, and these factors will be discussed to develop a model for stabilized dune erosion.

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