Abstract
This paper describes the physiographic and chemical characteristics of calcareous crusts (calcrete) in north-western Libya. The crust in north-western Libya may be formed in two ways. The first type forms at the soil surface as a result of evaporation of shallow ephemeral lakes: the second forms within the soil profile as a result of leaching by percolating surface water saturated with CaCO 3 . The formation of the crust is a function of geological setting, climate, morphology and time.
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