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Showing 1 to 16 of 16 for “"interdune"”.
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The Karoo sand sea in changing climates: Early Jurassic interdune lakes and erg dynamics in southern Africa
… expansion of loess plains with seasonally wet interdunes. Sediment, mostly supplied from the west, was overwhelmingly recycled from pre-existing, Karoo-age deposits and sedimentary rocks associated with the Pan-African orogeny, although evidence for some non-sedimentary and young, syn-Clarens …
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Soft-sediment Deformation and Dune Collapse in the Navajo Sandstone
… eolian dune, and run-out over an expanse of interdune sediments downwind of that bedform. Exposed features include dramatic folds in the interdune succession and a stacked series of thrust sheets incorporating both interdune and overlying dune deposits. Thrust surfaces display consistent …
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Airflow dynamics in transverse dune interdunes
Aeolian dune interdunes have been relatively ignored when compared with the research attention on the morphodynamics of the dune bodies themselves. This neglect is in spite of the possible significance of interdune dynamics for the geomorphology of the sand dune system as a whole, especially with …
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Effects of Grazing by Feral Horses on Dune and Salt Marsh Vegetation at Cumberland Island, Georgia
… in 1 X 2m quadrats in two subhabitats: foredune/interdune and high/low marsh. Dune surveys measured and analyzed species richness, total percent cover of vegetation, and percent cover of species observed grazed. Salt marsh surveys measured and analyzed species composition, species richness, …
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A multidisciplinary approach to reservoir characterization of the coastal Entrada erg-margin gas play, Utah
… eolian-influenced facies interbedded with sandy interdune facies. They are sealed vertically by muddy and silty facies of associated tidal flat deposits that act as excellent stratigraphic traps in the subsurface. A variety of approaches were used to characterize these Entrada erg-margin …
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Reservoir Characterization and Outcrop Analogs to the Navajo Sandstone in the Central Utah Thrust Belt Exploration Play
… porosity and 100 mD of permeability). Five interdune facies display finer grain size, more abundant cement, and relatively lower porosity and permeability (approximately 18 percent porosity and 29 mD of permeability). Four of the five inderdune facies have variable porosity and permeability …
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Three-dimensional eolian bounding surface architecture of the Entrada sandstone, Utah: expanding our understanding of reservoir heterogeneity in wet eolian systems
… with no perceived trends. Five modeled interdune migration surfaces are also undulatory but exhibit a ~0.09° angle of climb toward the south-southwest (roughly parallel to the paleowind direction). Three modeled superimposition surfaces are concave up and some are quite sinuous in …
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Factors affecting Wilson's Plover (Charadrius wilsonia) demography and habitat use at Onslow Beach, Marine Corps Base Camp Lejeune, North Carolina
… crab (Uca spp.) mud flats, beach front, and interdune sand flats) at Onslow Beach, Marine Corps Base Camp Lejeune, North Carolina, 2008-2009. I observed little difference between years in nest success (≥ 1 egg hatched), failure, and overall nest survival. The majority of nest failures were …
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Aeolian sand movement in an arid linear dune ecosystem, Nizzana, Western Negev, Israel
… side, a rapid return of the vegetation in the interdune corridors and on the footslopes of the dunes took place. In addition also a reduction of obviously active areas on the dune crests was observed. The situation on Egyptian territory west the border remained unchanged until today. This study …
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Depositional and Diagenetic History of the Permian Unayzah A Reservoir, South Haradh, Saudi Arabia with Implications for Deep Gas Exploration and Development
… of 5 meters or less, of eolian dune, sand sheet, interdune and ephemeral (playa) lake facies. Diagenetic products in Unayzah A developed during a continuum of eogenetic and mesogenetic reactions. Early or eogenetic cements are dominated by clay rims that formed at temperatures below 70oC. Oil …
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Demography, Nest Site Selection, and Physiological and Behavioral Responses to Overflights and other Human Activities, of Wilson's Plover (Charadrius wilsonia) at Cape Lookout National Seashore, North Carolina
… were present. Wilson's Plovers selected for interdune areas, flats and isolated dunelets on flats, and against beach and dunes. At the local scale, nests were more likely to be near dense vegetation than random points. Mayfield nest survival was 25%, and predation caused most of the nest …
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Synapsid Burrows in the Lower Jurassic Navajo Sandstone, Utah
Enigmatic structures below interdune deposits of the Lower Jurassic Navajo Sandstone near Moab, Utah are interpreted as synapsid burrows based on similar morphologies to fossil and extant synapsid burrows. Two types of burrows are distinguished by their size. Type I burrows are large diameter and …
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Lower Kuiseb River sediments and their control on dust emission
… gravel plain surfaces and tributaries, dunes and interdune, all of which were analysed using a Malvern Mastersizer 2000 laser diffractometer. In addition, other sediment characteristics such as mineralogy, organic matter content, soluble salts; and selected surface roughness elements were also …
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Seismic and Well Log Attribute Analysis of the Jurassic Entrada/Curtis Interval Within the North Hill Creek 3D Seismic Survey, Uinta Basin, Utah, A Case History
… areas of lower sand content (i.e. muddier interdune or tidal flat facies). Lack of significant average porosity does not seem to be related to a lack of production. In fact, the best producing wells have been drilled in Entrada/Curtis intervals where average porosity is near 4 %. There are …
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The Broom Creek Formation (Permian), in southwestern North Dakota: depositional environments and nitrogen occurrence
… existed as dune fields with accompanying interdune areas. </p><p> The main diagenetic events in the nearshore marine sandstone lithofacies include iron oxide precipitation, dolomitization of carbonate cement, quartz overgrowths, and pressure dissolution. The diagenetic history of the …
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Ephemeral river systems at the Skeleton Coast, NW-Namibia - Sedimentological and geomorphological studies on the braided river dominated Koigab Fan, the Cenozoic succession in the Uniabmond area and comparative studies on fluvio-aeolian interaction between ephemeral rivers and the Skeleton Coast Erg
… by dune damming of the rivers during flood; 4) interdune flooding causing stacked mud-pond sequences; and 5) the termination of the erg by more frequent river floods.