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Bayanzag | Fossil dune with old crusts
WI_mo116.jpg Bayanzag  |  Fossil dune with saxaulThumbnailsBayanzag  |  Panorama of rock formation

Caliche or gypcrust commonly form near the soil surface in arid and semiarid regions as a result of ascending subsurface water. Harder than the surrounding sands of this fossil dune, they are less susceptible to erosion.

Wednesday 16 July 2014 by Martin Mergili in Asia / Mongolia (2640 visits)