Braided stream aggradation on an alluvial fan margin : Emerald Lake fan, British Columbia
Alluvial cone ; Braided channel ; British Columbia ; Canada ; Cold area ; Fluvial processes ; Grain size distribution ; Meltwater ; Pic discharge ; Sediment transport ; Stream flow ; Summer
Etude des processus de transport sédimentaire et de formation de chenaux anastomosés sur la marge distale d'un cône alluvial actif, Lac Emerald, Colombie Britanique, en période de débit maximum, mi-saison estivale.
This paper describes how mass movement is dissecting a relict alluvial fan at the margin of the Sele Valley graben. Rock mass structure and neotectonics are treated here, not as controls upon fan sedimentation, but as a fundamental cause
Impact of tectonics on alluvial landforms in the Hexi Corridor, Northwest China
Alluvial cone ; Cenozoic ; China ; Fault ; Fluvial processes ; Fluvial terrace ; North-Western China ; Tectonics ; Vertical movement
The Hexi Corridor is a Cenozoic foreland basin system on the northeast margin of the Qinghai-Tibet Plateau. The structure is characterised by reverse faults trending NNW or WNW. This paper focuses on the response of alluvial landforms to tectonic
Response of alluvial fan systems to the late Pleistocene to Holocene climatic transition : contrasts between the margins of pluvial lakes Lahontan and Mojave, Nevada and California, USA
Alluvial cone ; California ; Climatic variation ; Holocene ; Lake ; Lake level ; Nevada ; Palaeo-environment ; Palaeobotany ; Palaeoclimate ; Pleistocene ; United States of America
This paper deals with 2 contrasted mountain-front alluvial fan systems in the American Basin and Range province. An assessment is made of the extent to which differences in fan regime between the 2 areas over the period from the late Pleistocene
Cyclic Quaternary alluviation and terracing in a nonglaciated drainage basin on the north flank of the Qinling Shan, Central China
This investigation was designed to map a suite of Quaternary stream terraces that record fluctuating hydrologic regimes in a nonglaciated drainage basin at the southern margin of the Loess Plateau, to date the terraces using the loess/paleosol
Alluvial cone ; Fluvioglacial features ; Geochronology ; Glacial features ; Michigan ; Moraine ; Quaternary ; Sedimentary structure ; United States of America
glaciofluvial formations marking successive marginally stagnant glacial termini. Small disintegration ridges associated with major heads of outwash probably record the transition to warmer conditions with final deglaciation. Such relationships agree
with interpretations accounting for large amounts of superglacial drift marginal to the Laurentide ice sheet.
La phase initiale dite du rifting avec environnement lacustre et alluvial a été suivie par la subsidence et l'invasion marine. Les zones de fracture (Açores, Saint-Paul, Ascension, Walvis et Aiguilles) permettent de subdiviser la marge en 4 grands
Holocene desert soil formation under sodium salt influence in a playa-margin environment
2000yr. Such soils can be used as stratigraphic markers, but could be confused with other desert soils with clay-accumulation horizons (Haplargids) which occur much more commonly on desert alluvial fans, are mostly late Pleistocene or older, and do
not form in parent materials that are still calcareous. This Natrargid formed in a playa-margin environment, where clay for translocation and sodium salts that engender rapid clay movement probably were provided by dust fall.
Cono de deyección ; Cuaternario ; Falla ; Geomorfogénesis ; Geomorfología ; Incisión ; India ; Llanura aluvial ; Piemonte ; Río Ganges ; Sedimentación ; Subsidencia ; Tectónica
(PZ) of the western Ganga Plain. A large alluvial fan and incised river valley surfaces with numerous cut-off channels/palaeochannels are the main landforms of the area. The proximal basin margin, against the Himalaya mountain range, is defined
This paper discusses the morphological and geological evidence for Pleistocene neotectonic faulting and uplift in the northeastern part of the Sowie Mountains where the Sudetic Marginal Fault has its maximum deplacement and uplift rates. Although
the greatest uplift was during the Neogene tectonic phases, Pleistocene fault activity was significant and influenced the development of river valleys and foreland alluvial fans. This contradicts with former views.
, river channels, alluvial cones and fans and slope failures with archaeological evidence of seismic events at the Acropolis along the eastern margin of the Argive Plain in order to obtain an improved understanding of the paleoseismicity of this region.
Tettonica trascorrente pleistocenica lungo il margine occidentale del Plateau Ibleo (Sicilia sud-orientale)
as the village of Monterosso Almo and separates an uplifted sector to the south-east, where Oligo-Miocene limestones outcrop, from a downfaulted sector to the north-west, where large alluvial fans and Pleistocene marine sediments lie unconformably on the Oligo
Agricultural land use ; Alluvial cone ; Dune ; Erosion ; Geomorphometry ; Human impact ; Hungary ; Spatial distribution ; Temperate zone ; Typology
The primary aim of this paper is to describe the morphology of dunes in the Nyírség alluvial fan in Hungary and classify them based on their morphometric characteristics. The other major aim is to select those dunes which were exposed to significant
anthropogenic impact, and to determine the spatial and temporal differences in the intensity of human activity. The following dune types were separated: valley-marginal, transitional valley-marginal, transitional parabolic, filled, partially and unfilled
Concept ; Marginal area ; Marginality ; Regional development ; Research ; Slovenia ; Social exclusion
Concepto ; Desarrollo regional ; Eslovenia ; Espacio marginal ; Exclusión social ; Investigación ; Marginalidad
This text gives a brief overview of the research work in the field of geographical marginality in Slovenia and presents some of the views and findings of the A. about geographical marginality and about marginal areas in Slovenia. The topic
Tectonic geomorphology of the Hikurangi margin : surface manifestations of different modes of subduction in The geomorphology of plate boundaries and active continental margins.
Bassin marginal ; Géographie physique ; Géomorphologie structurale ; Morphotectonique ; North Island ; Nouvelle-Zélande ; Subduction ; Tectonique ; Tectonique de plaques
There are major changes in the tectonic geomorphology of the Hikurangi margin along its length. In the north all the typical forearc, arc and back arc elements occur| in the south there are no arc or backarc elements even though the subducted slab
Changes in ice-margin processes and sediment routing during ice-sheet advance across a marginal moraine
Advance of part of the margin of the Greenland ice sheet across a proglacial moraine ridge between 1968 and 2002 caused progressive changes in moraine morphology, basal ice formation, debris release, ice-marginal sediment storage, and sediment
Sustainable land management in marginal mountain areas of the Himalayan region
There is little arable land in the hills and mountains of the Himalayan region, where small, marginal farmers try to eke out a living. A new thinking advocates research in niche based sustainable production systems on marginal lands as part
of the effort to provide food security and sustainable livehoods for such marginal farmers. The International Centre for Integrated Mountains Development's (ICIMOD) afforestation strategies for degraded marginal areas are discussed, with reference to Sikkim