Linear dune pattern variability in the vicinity of dry valleys in the southwest Kalahari
Aeolian features ; Aerial photography ; Arid area ; Barchan ; Botswana ; Dune ; Geomorphometry ; Kalahari ; Palaeo-environment ; Valley ; Wind
This paper describes the main association between dunes and valleys which occur in the southwest Kalahari dunefield and to review current explanations from localised dune pattern evolution and development in this and other dunefields of low relative
relief. The study is based upon a combination of field observations, analysis of aerial photographs and map interpretation of the dunes within 10 km of the major valleys which dissect the southwest Kalahari dunefield.
The character and age structure of valley fills in upper Wolumla Creek, south coast, New South Wales, Australia
Australia ; C 14 dating ; Carrying capacity ; Floodplain ; Gully erosion ; Human impact ; New South Wales ; Sediment filling ; Valley
This paper describes the nature of valley fill deposits at the base of the escarpement in part of Bega catchment. Extensive valley fills, up to 12 m deep but no greater than 300 m wide, have formed in the upper reaches of Wolumla Creek, a north
-south aligned subcatchment. The sedimentary character, nature of depositional processes, and age structure of the valley fill deposits are analysed.
The morphological development of alpine valley heads in the Antarctic Peninsula
Antarctica ; Cirque ; Cold area ; Earth surface processes ; Geomorphometry ; Glacial features ; Glacial valley ; Glaciation ; Model
Glaciation has continued in Antarctica for longer than anywhere else on Earth, so the long-term development of glaciated landforms can be investigated. This study is based on a morphometric analysis of the plan form of 1680 alpine valley heads
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
U-series chronology of lacustrine deposits in Death Valley, California
This paper reports the chronology as established by the uranium-series dating on a core drilled from Badwater Basin in Death Valley. To assess the source of uranium in these lacustrine deposits, the AA. have also analyzed uranium and its isotopic
Paleoclimatic significance of late Quaternary lacustrine and alluvial stratigraphy, Animas Valley, New Mexico
The purpose of this study is to use lacustrine and alluvial stratigraphy, landforms, soil evidence, and radiocarbon ages to econstruct the latest Quaternary geologic history of the southern Animas Valley, New Mexico. Because the late Quaternary
The basic concept of the elaboration was a geomorphological analysis to be carried out jointly with that of its framing river valleys (Hernád, Bódva) constituting the relief boundary. The general evolution of the Hernád Valley : the article provides
is focused on the valley segments of different character closely related to the geomorphic evolution of the Bódva Valley (basins and gorges) and on the intrinsic system of terraces. - (ZK)
Early Pleistocene glacial Lake Lesley, West Branch Susquehanna River valley, central Pennsylvania
The AA. use new exposures in the West Branch Susquehanna River (WBSR) valley and magnetostratigraphy to reconstruct depositional environments in Glacial Lake Lesley, constrain the age of Glacial Lake Lesley, and constrain the maximum extent
of Glacial Lake Lesley. To achieve these objectives, detailed stratigraphic sections were described at McElhattan and Linden. The AA. use paleomagnetism as an age correlation tool in the WBSR valley to correlate contemporeanous glaciofluvial and proglacial
Anthropogenically accelerated mass movement, Kulu Valley, Himachal Pradesh, India
Bank erosion ; Catastrophe ; Flood ; Heavy rain ; Himachal Pradesh ; Human impact ; India ; Landslide ; Mass movement ; Slope dynamics ; Valley
This paper examines the factors and processes responsible for triggering widespread mass movement and related damages in the Kulu Valley. Whereas some smaller events occurred in the early and middle part of this century, the recurrence and intensity
The Dneper valley carried away proglacial waters to the Black Sea during the maximum of the last glaciation. Dneper, having multiplied discharges, flowed in two branches of the valley. After the proglacial water supply ceased, the river incised
and the evolution took place only in the one active branch (valley). Only young terraces are preserved in the section between Orsha and Shklov : low Vistulian-Young Pleniglacial terraces and two levels of the Late Glacial-Holocene flood plains. With the large
Edaphic interslope and valley bottom differences at Evolution Canyon, lower Nahal Oren, Mount Carmel, Israel
slope warmer, drier and more variable than the north-facing slope and valley bottom. Consequently, biodiversity is greater. Differences in soil morphology, moisture regime and microfabric between the north- and south-facing soils suggest that they belong
This study employs data from valley-bottom surveys, coring investigations, topographic maps, and aerial photographs to identify and explain spatial variations in historical alluviation along tributary streams in the Buffalo River watershed
, an agricultural watershed in west-central Wisconsin. Similar to findings from other agricultural watersheds, the spatial distribution of historical alluvium in the Buffalo watershed reflects the controlling influence of watershed size and valley-bottom width
. An additional significant factor that has affected valley-bottom sedimentation is historical channel incision.
Productivity, population structure and subsistence use of a white spruce forest in the Kennicott Valley, Alaska
White spruce on 26 sites in a sparsely populated Alaskan valley was examined for management of subsistence firewood and house-log harvest. Residants were interviewed to ascertain harvest patterns and quantities. Sites had even-age stands and mixed
The middle reaches of the Tsangpo River consist of alternating sections of wide valleys and gorges. The wide valley sections have braided and anastomosing channels, gentle hydraulic gradients, thick alluvial deposits and low terraces. In contrast
, landform and sedimentary analyses along with dating information, suggest that the key could be the active faults across the river valley.
Sublimation of ice through sediment in Beacon Valley, Antarctica
The time-dependent physics of ice sublimation through thin layers of till is considered, to determine whether sublimation could be sufficiently slow to permit the preservation of ice for 8 MA in the Dry Valleys, Antarctica. Steady-state models
Using sediment fingerprints to assess sediment-budget errors, North Halawa Valley, Oahu, Hawai, 1991-92
for the North Halawa Valley, a mountainous, forested drainage basin on the island of Oahu, during construction of a major highway. Sediment and aerosol budgets were developed using data collected in 1991. Differences between sediment-budget and aerosol-budget
France ; Glaciolacustrine ; Jura ; Mass movement ; Postglacial ; Sediment budget ; Slope dynamics ; Soil erosion ; Valley
The middle valley of the river Ain (Jura) cuts through glacio-lacustrine deposits laid down in an ice-dammed lake during the most recent glacial advance. The high values of sediment yield are ascribed to the amenability of glacio-lacustrine deposits
to mechanical weathering and to the rapid geomorphological changes that affected glacial and paraglacial sedimentary cover after the retreat of the ice. The valley slopes were destabilized by mass wasting (earthflow and mudflow), which was was the predominant
During the late Holocene, accumulation and downcutting stages affected the slopes and infilled valleys in the semiarid areas in NE Spain. The presence of archaeological remains, charcoal and ashes within slope deposits and valley fills makes
it possible to carry out accurate datings. The diachronisms among different infilled valleys may be caused by both human activity and complex responses of the system. This paper synthesizes existing knowledge and a climatic model for the late Holocene, and its