Photos

The dune field Jarangiyn els is situated in the intermontane basin in the Gobi Tien-Shan.
We made there geographical exploraction. Results of our study was a sedimentological characteristic of barchan deposits after dust storm. The effects of a dust storm from the direction opposite to the dune-forming one caused very distinct changes in the morphology of barchans. The effect of a strong eastern wind lasted for only around ten to twenty hours. The result was a significant change of the profiles of the barchans. In the top parts of the dunes the build-up of the slopes in the direc-tion opposite to the original one occurred.