In the desert of Abarkoh Basin, Central Iran, the influence of playa-lake level fluctuations on recent sedimentation mode of a terminal ephemeral fluvial-fan system and adjacent lacustrine/aeolian sediments of a playa fringe environment has been investigated. The surface geomorphology-sedimentology and its relationship with shallow subsurface sediments along a >25 km transect, has been studied....

Integration of several geologic lines evidence reveals the prevalence a lowland trans-Andean portal communicating western Amazonia and westernmost Andes from at least middle Miocene until Pliocene times. Volcanism crustal shortening built up relief in southernmost Central Eastern Cordilleras Colombia, closing this gap. Independent consist first, field mapping Tatacoa Desert with coverage area ∼...

The natural environment affects the construction of desert highways. Conversely, highway construction affects the natural environment and puts the ecological environment at a disadvantage. To satisfy the variety and hierarchy of desert highway construction and discover the spatio-temporal distribution of the natural environment and its effect on highway construction engineering, an assessment o...

abstract soil organic matter and its components are important factors in formation and stability of aggregates and subsequently soil structure. however data regarding organic matter distribution in soil aggregates is scarce, particularly in arid soils of central iran. the objective of this study was to investigate the distribution of organic carbon (oc), total nitrogen (tn), and carbohydrates i...

The desert tortoise occurs in two strikingly different desert regimes in the southwestern United States. In the Mojave Desert, rainfall is more irregular and resources are more limited than in the Sonoran Desert. We examined the age structure of tortoise populations from these two deserts to determine whether the difference in resource availability has driven an evolutionary divergence in life ...

Snare use in the arid Desert West of North America is characteristic of a broad-spectrum subsistence strategy, a conclusion supported by the contextual occurrence of snare bundles. Such a system insured against economic crises by including a wide range of plants and animals on its list of food items. It is suggested that microfauna, which are often relegated to the "also present" category of ar...

introduction the dust storms are one of the climatic hazards in the dry climates of the world. they cause many damages to the environment and humans. one of the aspects of a study to understand the origin of this phenomenon is the formation of foci in the recent years in the areas of research. it has been done in the central regions. the dust storms have gained global scale. this has demonstrat...