inscription
Portail d'information géographique

Résultats de la recherche (624 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
Pedogenesis on products of weathering of very ancient schist-sandstones in the savannas of Mali
  • Pedogenesis on products of weathering of very ancient schist-sandstones in the savannas of Mali
  • Alterite ; Catena ; Dust storm ; Erosion rate ; Geochemistry ; Humus ; Mali ; Niger ; Pedogenesis ; Precipitation ; Savanna ; Soil catena ; Tropical zone ; Valley ; West Africa
Recent and ancient pedogenesis in some landscapes of interior Dagestan
  • Recent and ancient pedogenesis in some landscapes of interior Dagestan
  • Climate ; Dagestan ; European part of Russia ; Humus ; Meadow ; Mountain ; Pedogenesis ; Soil properties
Red Mediterranean soils in some karstic regions of Taurus mountains, Turkey
  • Carbonate rock ; Cenozoic ; Clay mineral ; Fracture ; Karst ; Limestone ; Mediterranean climate ; Palaeosol ; Pedogenesis ; Red soil ; Soil ; Soil properties ; Turkey
  • The objective of this work is to provide further explanation regarding the pedogenesis of Red Mediterranean soils in the karstic Mediterranean regions of Turkey. Sedimentary petrology and mineralogy of limestones are the factors that control
  • the course of the pedogenesis. Most of the red soils in the studied karstic regions were likely developed during the Tertiary and hot and humid periods of the Quaternary epochs. Large body of soils which are found in deep limestones suggest their formation
Complex pedogenesis related to differential aeolian sedimentation in microenvironments of the southern part of the semiarid region of Argentina
  • Complex pedogenesis related to differential aeolian sedimentation in microenvironments of the southern part of the semiarid region of Argentina
  • Aeolian features ; Argentina ; Arid area ; Buenos Aires ; Heavy minerals ; Lithology ; Micromorphology ; Pedogenesis ; Semi-arid area ; Spatial variation ; Vegetation
Paleosols in the moraine-mantle loam sequence of northeastern Europe : the memory of pedogenesis rates and evolution of the environment during OIS3
  • Paleosols in the moraine-mantle loam sequence of northeastern Europe : the memory of pedogenesis rates and evolution of the environment during OIS3
  • Catena ; Eastern Europe ; Europe ; Loam ; Moraine ; Palaeosol ; Palynology ; Pedogenesis ; Quaternary
Anthropic pedogenesis of purple rock fragments in Sichuan Basin, China
  • Anthropic pedogenesis of purple rock fragments in Sichuan Basin, China
  • China ; Human impact ; Nutrient ; Pedogenesis ; Rock ; Sichuan ; Soil improvement
Soils in the Holocene alluvial sediments of the Rio Fraja Valley, Spain : in situ or soil-sediments ?
  • Recent and paleo-pedogenesis as tools for modelling past and future global change
  • Alluvium ; Cádiz ; Holocene ; Palaeomagnetism ; Palaeosol ; Pedogenesis ; Quaternary ; Spain ; Stratigraphy
  • 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
Loessic silt deposits in the Western Himalayas : their sedimentology, genesis and age
  • Asia ; Clay mineral ; Dating ; Grain size distribution;Granulometry ; Himalaya ; Karakoram ; Loess ; Microstructure ; Pedogenesis ; Sedimentology ; Surface deposits ; Thermoluminescence
  • Fieldwork and sedimentological analysis including grain size, mineralogy and microfabric showed that the loessic sediments have been reworked and some have undergone weak pedogenesis. It is concluded that care must be taken when using loessic silts
Soil formation and erosion in the Murree Hills, northeast Pakistan
  • Erodibility ; Mountain ; Pakistan ; Pedogenesis ; Slope gradient ; Soil erosion ; Soil properties ; Vegetation
  • Soils at altitudes ranging from 700 to 3000 m in the Murree Hills have been examined in terms of pedogenesis and erosion. Weathering is evidenced by iron release and dissolution of calcareous materials, but the development of weathering
Soil chronosequence, soil development, and soil evolution : a critical review
  • Chronosequence ; Classification ; Concept ; Dune ; Floodplain ; Moraine ; Palaeosol ; Pedogenesis ; Soil ; Terrace
  • of settings in which chronosequences are now investigated. Third, it considers two rival theories of pedogenesis, the developmental and the evolutionary, and briefly explores the evidence for them in chronosequence investigations.
Spatial variability of soil properties at different scales within three terraces of the Henares River (Spain)
  • Chronosequence ; Fluvial terrace ; Model ; Pedogenesis ; Soil properties ; Soria ; Spain ; Spatial variation ; Statistics
  • material and pedogenesis of the terraces. The study examines sampling at different spatial scales to establish 1) differences among 3 selected terraces of lower, medium and upper Pleistocene age and 2) short- and medium-range variations occurring within
The genesis and age of the Argillic horizon in Weichselian loess of northwestern Europe
  • Europe ; Loess ; Northwestern Europe ; Pedogenesis ; Quaternary ; Stratigraphy ; Surface deposits
  • the pedostratigraphical record was preserved, the Bt formation can be mainly attributed to the Bolling Inteerstadial. Younger events exist also in the Early Holocene. In most of these sites, Holocene pedogenesis is reduced to an acidification of even a podzolization
Vistulian and Holocene aeolian activity, pedostratigraphy and relief evolution in Central Poland
  • Dune ; Eolian features ; Human impact ; Palaeogeography ; Palaeosol ; Pedogenesis ; Poland ; Quaternary ; Stratigraphy
  • Two periods of Vistulian aeolian activity are recognized : 1) Early and Plenivistulian period of aeolian abrasion and 2) Late Vistulian period of aeolian accumulation interrupted by phases of pedogenesis. The Old Holocene period was the period
Rates of soil formation on Black Mesa, northeast Arizona : a chronosequence in late Quaternary alluvium
  • The soil chronosequence on Black Mesa, including 17 well-dated surface and buried soils, permits quantification of rates of pedogenesis in a semi-arid region. High resolution dating suggests rates of pedogenesis are rapid. They incorporate
Soil formation in alases
  • Frozen ground ; Pedogenesis ; Periglacial features ; Russia ; Sedimentation ; Soil ; Thermokarst ; Yakutia
  • Alases are very dynamic, often geochemically closed thermokarst basin topographic forms that have a thin active layer and unique conditions of pedogenesis and vegetation development. In central Yakutia alone, there are about 16,00 alases
The role of loess-paleosols formation in the study of the regularities of pedogenesis in Loess and environment - selected papers.
  • The role of loess-paleosols formation in the study of the regularities of pedogenesis in Loess and environment - selected papers.
Effects of treethrow microtopography on the characteristics and genesis of spodosols, Michigan, USA
  • This study examines : 1) the morphology of mound, pit, and undisturbed pedons| 2) the effect of pit/mound microtopography on soil water content and soil freezing| 3) the spatial and temporal variability of pedogenesis as indicated by cations of Fe
  • , Al and H in soil solutions, and 4) the relationships between microtopography, soil frost, and infiltration as they relate to pedogenesis.
Vignobles et géologie
  • Aquitaine ; Bordeaux ; France ; Man-environment relations ; Pedogenesis ; Terroir ; Vine ; Vinegrowing area
  • Francia ; Pedogénesis ; Relación hombre-medio ambiente ; Terruño ; Viña ; Viñedo
Pedology of soils within the spray zone of the Victoria Falls (Zimbabwe)
  • Arid area ; Biogenic process ; Clay mineral ; Micromorphology ; Pedogenesis ; Precipitation ; Semi-arid area ; Soil properties ; Weathering ; Zimbabwe
  • Six profiles were sampled in the Victoria Falls National Park in order to investigate the influence of the abundant spray of the falls on the pedogenesis in the otherwise semi-arid environment. Chemical, mineralogical and micromorphological analyses
Holocene development of soils in response to environmental changes : the Novosvobodnaya archaeological site, North Caucasus
  • Recent and paleo-pedogenesis as tools for modelling past and future global change
  • Archeological site ; Caucasus ; European part of Russia ; Forest ; Holocene ; Palaeo-environment ; Pedogenesis ; Soil ; Steppe