soils of the arid–semiarid karaj basin in north-central iran have formed on alluvium-colluvium derived from mixed calcareous-gypsiferous marls of miocene and basic igneous rocks of holocene age. in order to characterize and classify the soils and to determine the soil-landscape relationship in the area, sixteen pedons located on different physiographic positions have been described, sampled and...

Abstract Geochemical data and their various approaches are useful to evaluate the climatic control on depositional environments. This study aims paleoweathering plaeoclimate condition that have controls environments of Miocene Pliocene siliciclastic sequence at Al-Rehaili area, north Jeddah. To achieve this aim, selected sandstone samples were geochemically (major trace elements analysis) petro...