According to relevant statistics, more than 90% of domestic high-grade asphalt pavement is semi-rigid base pavement, and cracking a congenital stubborn disease common. In Tengger Desert section Wuma expressway, the temperature difference large, shrinkage dry difficult avoid, resulting in decline structure strength. Once cracked, equivalent flexible structure; residual fatigue strength greatly r...

Varnish microlamination (VML) dating is a correlative age determination technique that can be used to date and correlate various geomorphic features in deserts. In this study, we establish a generalized late Quaternary (i.e., 0–300 ka) varnish layering sequence for the drylands of western USA and tentatively correlate it with the SPECMAP oxygen isotope record. We then use this climatically corr...

Ž . The vesicular, fine-grained A horizon Av is the widespread, ubiquitous surficial horizon of desert soils in diverse landforms and parent materials of varying ages. Now known to form mostly through accumulation of eolian dust, recent studies show that dust accumulation and concomitant soil development are genetically linked to stone pavement formation. Changes in the magnitude of eolian acti...

We report the discovery of numerous in situ Miocene and Pliocene airfall volcanic ashes that occur within the hyperarid Dry Valleys region of the Transantarctic Mountains in southern Victoria Land, Antarctica. Ashes that occur above 1000 m elevation rest at the ground surface, covered only by a thin ventifact pavement 1 to 2 cm thick. The ash deposits are loose and unconsolidated and show no si...

due to the hard climatic conditions of the yardang region in the lut desert, not much information about land surface temperatures of this region, one of the extremely arid cli-matic zones of iran, has been extracted. therefore, in this study in order to obtain some information about important surface features of the lut desert (marl, grey sand, bright sand and salt affected land), field tempera...

Introduction: The 2003 Mars Exploration Rover science strategy is to identify promising targets for the rover using the visible imaging Pancam and thermal infrared imaging Mini-TES. Those targets would then undergo detailed examination using a suite of instruments including an alpha particle x-ray spectrometer, a Mössbauer spectrometer, and a microscopic imager. Team members will select sites u...

packed gravel that overlies a thin (3–10 cm), fine-grained, gravel-poor, vesicular A (Av) soil horizon.1 Desert paveDesert pavements are prominent features in arid environments ments are prominent features in arid environments and and consist of a surface layer of closely packed gravel that overlies a thin, gravel-poor, vesicular A (Av) soil horizon. Well-developed Av can be found on a variety ...

Pavement condition evaluation is a significant part of a good pavement management system for effective maintenance, rehabilitation, and reconstruction decision-making. One of the key components of pavement condition evaluation is the quantification of pavement distresses data. Cracking is the main form of early pavement distresses. Cracking of pavement affects road condition, driving comfort, t...

Two types of microtopographic features (plant scar mounds and plant scar depressions) on surfaces of barren desert pavements provide a unique record of the former presence of large perennial plants. Evidence of bioturbation by burrowing animals extends more than I m beneath each type of plant scar, indicating that both features originated as large bioturbation mounds. Formation of bioturbation ...